Item 6. Selected Financial Data



In millions, except per share amounts Year ended May 31,	2015			2014 (1)			2013 (2)			2012			2011
Service revenue	$	2,697.5		$	2,478.2		$	2,285.2		$	2,186.2		$	2,036.2
Interest on funds held for clients	42.1			40.7			41.0			43.6			48.1
Total revenue	$	2,739.6		$	2,518.9		$	2,326.2		$	2,229.8		$	2,084.3
Operating income	$	1,053.6		$	982.7		$	904.8		$	853.9		$	786.4
Net income	$	674.9		$	627.5		$	569.0		$	548.0		$	515.3
Diluted earnings per share	$	1.85		$	1.71		$	1.56		$	1.51		$	1.42
Cash dividends per common share	$	1.52		$	1.40		$	1.31		$	1.27		$	1.24
Purchases of property and equipment	$	102.8		$	84.1		$	98.7		$	89.6		$	100.5
Cash and total corporate investments	$	936.4		$	936.8		$	874.6		$	790.0		$	671.3
Total assets	$	6,482.5		$	6,370.1		$	6,163.7		$	6,479.6		$	5,393.8
Total debt	$	—		$	—		$	—		$	—		$	—
Stockholders’ equity	$	1,785.5		$	1,777.0		$	1,773.7		$	1,604.5		$	1,496.2
Return on stockholders’ equity	36		%	35		%	34		%	34		%	35		%


(1)	With the introduction of a new health care offering within the PEO, the Company began to recognize certain PEO direct costs as operating expenses rather than as a reduction in service revenue. In the table above, this impacted service revenue and total revenue, but had no impact on operating income.


(2)	In the fourth quarter of fiscal 2013, the Company increased its tax provision related to the settlement of a state income tax matter. This reduced diluted earnings per share by approximately $0.04 per share.