Item 6. Selected Financial Data

Five-Year Summary (Unaudited)


(Dollars in millions, except per share data)	2020	2019	2018	2017	2016
Revenues	$58,158	$76,559	$101,127	$94,005	$93,496
Net (loss)/earnings	($11,941)	($636)	$10,460	$8,458	$5,034

Basic (loss)/earnings per share	($20.88)	($1.12)	$18.05	$14.03	$7.92
Diluted (loss)/earnings per share	(20.88)	(1.12)	17.85	13.85	7.83
Dividends declared per share (1)	—	8.22	7.19	5.97	4.69

Cash and cash equivalents	$7,752	$9,485	$7,637	$8,813	$8,801
Short-term and other investments	17,838	545	927	1,179	1,228
Total assets	152,136	133,625	117,359	112,362	109,076
Total debt	63,583	27,302	13,847	11,117	9,952

Operating cash flow	($18,410)	($2,446)	$15,322	$13,346	$10,496
Investing cash flow	($18,366)	($1,530)	($4,621)	($2,058)	($3,378)
Financing cash flow	$34,955	$5,739	($11,722)	($11,350)	($9,587)

Total backlog	$363,404	$463,403	$490,481	$474,640	$473,492	(2)

Year-end workforce	141,000	161,100	153,000	140,800	150,500

(1) In March 2020, the Board of Directors suspended the declaration and/or payment of cash dividends until further notice.

(2) 2016 Backlog does not reflect impact of the adoption of ASU No. 2014-09, Revenue from Contracts with Customers (Topic 606).