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                                  EXHIBIT 10.2

Part I: Amendment to Annex A to Performance Equity Unit Grant Agreement, dated
December 3, 1996, for 1997 (Filed as Exhibit 10.6 to Registrant's Form 10-K for
year ended December 31, 1996):

PERFORMANCE GOALS AND UNIT DISTRIBUTION SCHEDULE:



            AGGREGATE EARNINGS             % OF DISTRIBUTION
               PER SHARE                         BASED ON     
            1/1/97 - 12/31/99                    GRANTS 
            ------------------             -----------------
                                         
                $ 17.23                           150%      
                  16.65                           140%      
                  16.07                           130%      
                  15.50                           120%      
                  14.93                           110%      
                  14.36                           100%      
                  13.64                            90%      
                  13.28                            85%      
                  12.92                            80%      
                  12.20                            70%      
                  11.48                            60%      
                  10.77                            50%      
                 <10.77                             0



Part II: Amendment to Annex A to Performance Unit Grant Agreement, dated
December 2, 1997, for 1998 (Filed as Exhibit 10.2 to Registrant's Form 10-K for
year ended December 31, 1997):

PERFORMANCE GOALS AND UNIT DISTRIBUTION SCHEDULE:



          CUMMULATIVE NET INCOME           UNIT DISTRIBUTION
               PER SHARE                   AS A PERCENTAGE OF 
            1/1/98 - 12/31/00                UNITS GRANTED
            ------------------             -----------------
                                         
                $ 18.71                           150%      
                  18.08                           140%      
                  17.45                           130%      
                  16.83                           120%      
                  16.21                           110%      
                  15.59                           100%      
                  14.81                            90%      
                  14.42                            85%      
                  14.03                            80%      
                  13.25                            70%      
                  12.47                            60%      
                  11.69                            50%      
                 <11.69                             0


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