Item 6. Selected Financial Data The information set forth below should be read in conjunction with “Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operations” and our Consolidated Financial Statements and related notes included in this Annual Report on Form 10-K. (Dollars and shares in millions, except per share amounts) *Prior period total revenues and total costs of revenues r eflect the impact of the revision to PEO revenues for comparability. Refer to Note 1 to our Consolidated Financial Statements for more information on this revision. Years ended June 30, 2020 2019 2018 2017 2016 Total revenues* $ 14,589.8  $ 14,110.2  $ 13,274.2  $ 12,328.6  $ 11,632.1  Total costs of revenues* $ 8,445.1  $ 8,021.6  $ 7,757.4  $ 7,201.1  $ 6,840.4  Earnings from continuing operations before income taxes $ 3,182.6  $ 3,005.6  $ 2,282.6  $ 2,616.9  $ 2,234.7  Net earnings from continuing operations $ 2,466.5  $ 2,292.8  $ 1,884.9  $ 1,787.8  $ 1,493.4  Basic earnings per share from continuing operations $ 5.73  $ 5.27  $ 4.28  $ 3.99  $ 3.27  Diluted earnings per share from continuing operations $ 5.70  $ 5.24  $ 4.25  $ 3.97  $ 3.25  Basic weighted average shares outstanding 430.8  435.0  440.6  447.8  457.0  Diluted weighted average shares outstanding 432.7  437.6  443.3  450.3  459.1  Cash dividends declared per share $ 3.52  $ 3.06  $ 2.52  $ 2.24  $ 2.08  At year end: Cash, cash equivalents and marketable securities of continuing operations $ 1,922.1  $ 2,221.1  $ 2,180.5  $ 2,791.2  $ 3,222.4  Total assets $ 39,165.5  $ 41,887.7  $ 38,849.1  $ 38,886.8  $ 43,670.0  Obligations under reverse repurchase agreements $ 13.6  $ 262.0  $ —  $ —  $ —  Long-term debt $ 1,002.8  $ 2,002.2  $ 2,002.4  $ 2,002.4  $ 2,007.7  Stockholders’ equity $ 5,752.2  $ 5,399.9  $ 4,735.9  $ 4,984.1  $ 4,481.6 