(in thousands, except per share amounts) 2000 1999 1998 Operating revenues:   Rental revenue:     Minimum base rent   $ 448,068   $ 422,440   $ 379,502     Recoveries from tenants 64,344 58,426 46,947     Parking and other tenant charges 19,447 17,983 14,006       Total rental revenue 531,859 498,849 440,455   Real estate service income 26,172 17,054 16,167       Total operating revenues 558,031 515,903 456,622 Operating expenses:   Property expenses:     Operating expenses 124,119 122,676 109,514     Real estate taxes 45,864 44,529 40,174   Interest expense 98,348 89,057 71,419   General and administrative 46,189 38,894 32,356   Depreciation and amortization 128,542 119,700 100,810       Total operating expenses 443,062 414,856 354,273       Real estate operating income 114,969 101,047 102,349 Other income:   Interest income 4,372 3,936 3,989   Equity in earnings of unconsolidated entities 7,596 5,167 5,282   Gain (loss) on treasury locks — 4,489 (13,729 )       Total other income 11,968 13,592 (4,458 )       Income from continuing operations before income taxes,        minority interest, and gain on sale of assets and other provisions, net 126,937 114,639 97,891 Income taxes — (783 ) — Minority interest (16,149 ) (17,599 ) (16,072 ) Gain on sale of assets and other provisions, net 36,371 54,822 38,160       Income from continuing operations 147,159 151,079 119,979 Discontinued operations—Income (loss) from executive suite  operations (net of applicable income tax expense (benefit)  of $1,300, ($816) and $1,898, respectively) 456 (7,862 ) 6,518 Discontinued operations—Gain on sale of discontinued  operations (less applicable income tax expense of $21,131) 31,852 — —       Net income $ 179,467 $ 143,217 $ 126,497 Basic net income per common share:   Income from continuing operations $ 1.69 $ 1.71 $ 1.23   Discontinued operations 0.01 (0.12 ) 0.10   Gain on sale of discontinued operations 0.48 — —       Net income $ 2.18 $ 1.59 $ 1.33 Diluted net income per common share:   Income from continuing operations $ 1.65 $ 1.71 $ 1.23   Discontinued operations 0.01 (0.12 ) 0.09   Gain on sale of discontinued operations 0.47 — —       Net income $ 2.13 $ 1.59 $ 1.32 See accompanying notes to consolidated financial statements.