Exhibit 99.1 SELECTED QUARTERLY FINANCIAL INFORMATION (UNAUDITED) Selected quarterly information for the years ended December 31, 1999 and 1998 is as follows (in thousands, except per share amounts): Quarter Ended ---------------------------------------------------- 1999 December 31 September 30 June 30 March 31 - -------------------------- ----------- ------------ ------- --------- Revenues from Rental Operations $166,155 $160,273 $107,148 $101,987 Revenues from Service Operations 17,469 15,402 8,893 12,267 Net income available for common shares 41,184 41,462 29,596 27,394 Basic income per common share 0.33 0.35 0.33 0.32 Diluted income per common share 0.32 0.35 0.33 0.32 Weighted average common shares 125,412 118,820 88,353 86,370 Weighted average common and dilutive potential common shares 145,457 138,923 98,855 98,094 Funds From Operations (1) $ 72,017 $ 68,772 $ 48,624 $ 44,860 Cash flow provided by (used by): Operating activities $ 84,961 $175,233 $ 50,160 $ 32,326 Investing activities (197,131) (251,822) (150,741) (167,620) Financing activities 85,653 (50,873) 238,329 163,340 1998 - -------------------------- Revenues from Rental Operations $ 95,522 $ 90,348 $ 83,079 $ 79,676 Revenues from Service Operations 5,510 7,284 7,022 4,900 Net income available for common shares 23,302 23,449 21,858 22,262 Basic income per common share 0.28 0.29 0.27 0.29 Diluted income per common share 0.27 0.29 0.27 0.29 Weighted average common shares 84,394 81,594 80,080 76,655 Weighted average common and dilutive potential common shares 96,074 93,279 91,830 88,596 Funds From Operations (1) $ 42,990 $ 39,421 $ 36,933 $ 34,730 Cash flow provided by (used by): Operating activities $ 72,079 $ 48,798 $ 61,260 $ 39,051 Investing activities (233,013) (119,313) (242,439) (109,049) Financing activities 145,851 70,169 174,389 88,814 <TABLE\> (1) Funds From Operations is defined by the National Association of Real Estate Investment Trusts as net income or loss, excluding gains or losses from debt restructuring and sales of depreciated property, plus operating property depreciation and amortization and adjustments for minority interest and unconsolidated companies on the same basis. Funds From Operations does not represent cash flow from operations as defined by generally accepted accounting principles, should not be considered as an alternative to net income as an indicator of the Company's operating performance, and is not indicative of cash available to fund all cash flow needs.