1 EXHIBIT 4 MONTHLY LEASE RENTALS LEASE MONTH RENTALS - --------------------- ---------- (US$) April 2000........... 26,299,918 May 2000............. 18,159,742 June 2000............ 22,702,755 July 2000............ 16,973,964 August 2000.......... 18,180,075 September 2000....... 22,710,991 October 2000......... 17,515,197 November 2000........ 18,107,622 December 2000........ 22,034,089 January 2001......... 17,075,927 February 2001........ 18,330,805 March 2001........... 22,037,187 April 2001........... 17,542,045 May 2001............. 17,944,760 June 2001............ 21,953,432 July 2001............ 17,395,741 August 2001.......... 18,330,552 September 2001....... 21,972,775 October 2001......... 18,235,068 November 2001........ 18,193,373 December 2001........ 21,892,987 January 2002......... 17,316,872 February 2002........ 18,242,523 March 2002........... 21,891,090 April 2002........... 18,134,870 May 2002............. 18,301,447 June 2002............ 20,853,005 July 2002............ 17,913,605 August 2002.......... 18,794,469 September 2002....... 20,883,069 October 2002......... 18,513,025 November 2002........ 18,508,469 December 2002........ 20,599,744 January 2003......... 17,643,920 February 2003........ 18,422,727 March 2003........... 20,111,157 April 2003........... 18,893,938 May 2003............. 18,112,813 June 2003............ 20,348,317 July 2003............ 18,249,207 August 2003.......... 18,253,943 September 2003....... 20,231,608 October 2003......... 19,517,466 November 2003........ 18,493,358 December 2003........ 19,561,358 January 2004......... 18,481,749 February 2004........ 18,469,498 March 2004........... 19,533,340 April 2004........... 19,677,006 May 2004............. 18,504,306 LEASE MONTH RENTALS - --------------------- ---------- (US$) June 2004............ 19,521,306 July 2004............ 18,430,517 August 2004.......... 18,459,855 September 2004....... 19,527,855 October 2004......... 19,639,542 November 2004........ 18,280,958 December 2004........ 19,414,568 January 2005......... 18,346,568 February 2005........ 18,346,568 March 2005........... 19,108,977 April 2005........... 19,548,058 May 2005............. 18,472,563 June 2005............ 18,599,571 July 2005............ 18,599,571 August 2005.......... 18,570,875 September 2005....... 18,570,875 October 2005......... 19,570,182 November 2005........ 18,537,872 December 2005........ 18,524,210 January 2006......... 18,524,210 February 2006........ 18,524,210 March 2006........... 18,481,857 April 2006........... 19,292,858 May 2006............. 18,407,089 June 2006............ 18,348,828 July 2006............ 18,327,189 August 2006.......... 18,275,570 September 2006....... 18,264,257 October 2006......... 19,086,028 November 2006........ 18,222,843 December 2006........ 18,194,251 January 2007......... 18,157,532 February 2007........ 18,157,532 March 2007........... 18,157,532 April 2007........... 18,941,919 May 2007............. 18,097,911 June 2007............ 18,082,659 July 2007............ 18,082,659 August 2007.......... 17,773,434 September 2007....... 17,773,434 October 2007......... 18,509,901 November 2007........ 17,762,088 December 2007........ 17,685,852 January 2008......... 17,685,852 February 2008........ 17,641,560 March 2008........... 17,604,067 April 2008........... 17,456,460 May 2008............. 17,368,338 June 2008............ 17,352,204 July 2008............ 17,335,388 LEASE MONTH RENTALS - --------------------- ---------- (US$) August 2008.......... 17,335,388 September 2008....... 17,335,388 October 2008......... 17,258,270 November 2008........ 17,162,540 December 2008........ 17,162,540 January 2009......... 17,152,670 February 2009........ 17,142,842 March 2009........... 17,133,034 April 2009........... 17,133,034 May 2009............. 17,069,632 June 2009............ 17,069,632 July 2009............ 17,012,965 August 2009.......... 16,965,429 September 2009....... 16,965,429 October 2009......... 16,965,429 November 2009........ 16,894,311 December 2009........ 16,857,998 January 2010......... 16,857,998 February 2010........ 16,857,998 March 2010........... 16,826,929 April 2010........... 16,664,711 May 2010............. 16,664,711 June 2010............ 16,580,826 July 2010............ 22,716,139 August 2010.......... 16,330,653 September 2010....... 16,330,653 October 2010......... 16,165,499 November 2010........ 15,972,159 December 2010........ 25,116,702 January 2011......... 15,809,809 February 2011........ 15,809,809 March 2011........... 15,719,809 April 2011........... 15,640,874 May 2011............. 15,584,748 June 2011............ 15,451,427 July 2011............ 15,410,251 August 2011.......... 15,385,486 September 2011....... 15,365,122 October 2011......... 15,365,122 November 2011........ 15,294,127 December 2011........ 15,235,323 January 2012......... 15,174,614 February 2012........ 15,174,614 March 2012........... 15,174,614 April 2012........... 20,638,135 May 2012............. 14,870,783 June 2012............ 18,311,527 July 2012............ 14,710,999 August 2012.......... 14,708,671 September 2012....... 19,885,660 E-4-1 2 MONTHLY LEASE RENTALS (CONTINUED) LEASE MONTH RENTALS - --------------------- ---------- (US$) October 2012......... 17,867,304 November 2012........ 14,229,433 December 2012........ 14,068,037 January 2013......... 14,068,037 February 2013........ 13,987,507 March 2013........... 13,924,739 April 2013........... 17,084,281 May 2013............. 21,997,135 June 2013............ 13,234,803 July 2013 13,186,455 August 2013.......... 13,186,455 September 2013....... 13,186,455 October 2013......... 16,716,779 November 2013........ 16,192,838 December 2013........ 12,758,040 January 2014......... 21,406,124 February 2014........ 17,554,276 March 2014........... 12,120,782 April 2014........... 18,270,505 May 2014............. 11,756,471 June 2014............ 11,756,471 July 2014............ 11,641,183 August 2014.......... 11,535,363 September 2014....... 11,535,363 October 2014......... 11,535,363 November 2014........ 11,396,514 December 2014........ 11,329,940 January 2015......... 11,329,940 February 2015........ 11,329,940 March 2015........... 11,254,486 April 2015........... 18,207,074 May 2015............. 17,111,705 June 2015............ 10,379,234 July 2015............ 10,379,234 August 2015.......... 10,379,234 September 2015....... 10,379,234 LEASE MONTH RENTALS - --------------------- ---------- (US$) October 2015......... 18,131,152 November 2015........ 9,738,110 December 2015........ 9,686,195 January 2016......... 9,686,195 February 2016........ 9,686,195 March 2016........... 9,686,195 April 2016........... 9,634,807 May 2016............. 9,634,807 June 2016............ 26,972,818 July 2016............ 8,610,359 August 2016.......... 8,537,659 September 2016....... 8,494,670 October 2016......... 24,494,266 November 2016........ 7,834,803 December 2016........ 7,718,814 January 2017......... 11,299,052 February 2017........ 7,529,178 March 2017........... 24,025,724 April 2017........... 19,820,868 May 2017............. 6,308,438 June 2017............ 9,883,191 July 2017............ 6,087,449 August 2017.......... 6,082,582 September 2017....... 6,082,582 October 2017......... 5,925,310 November 2017........ 5,925,310 December 2017........ 5,839,716 January 2018......... 5,839,716 February 2018........ 11,592,746 March 2018........... 9,821,985 April 2018........... 18,282,691 May 2018............. 7,206,060 June 2018............ 12,209,340 July 2018............ 4,054,017 August 2018.......... 11,383,758 September 2018....... 3,699,201 LEASE MONTH RENTALS - --------------------- ---------- (US$) October 2018......... 3,699,201 November 2018........ 7,763,854 December 2018........ 6,892,544 January 2019......... 3,282,827 February 2019........ 3,241,548 March 2019........... 8,695,766 April 2019........... 2,934,047 May 2019............. 17,918,100 June 2019............ 2,400,637 July 2019............ 2,400,637 August 2019.......... 2,400,637 September 2019....... 5,169,376 October 2019......... 11,007,345 November 2019........ 5,574,365 December 2019........ 5,206,064 January 2020......... 1,632,100 February 2020........ 1,632,100 March 2020........... 1,632,100 April 2020........... 13,561,661 May 2020............. 1,246,451 June 2020............ 4,719,329 July 2020............ 1,783,087 August 2020.......... 1,048,152 September 2020....... 1,048,152 October 2020......... 1,048,152 November 2020........ 1,048,152 December 2020........ 5,937,046 January 2021......... 2,501,666 February 2021........ 2,484,770 March 2021........... 2,429,037 April 2021........... 506,143 May 2021............. 506,143 June 2021............ 5,481,496 July 2021............ 309,573 August 2021.......... 6,197,419 September 2021....... 0 E-4-2