Year Ended December 31
	2015	2014	2013
Expected term (in years)	5.16	5.23	5.27
Expected volatility	39%	37%	40%
Expected dividend yield	1.51 - 1.85%	0.94 - 1.77%	0.94 - 1.33%
Risk-free interest rate	1.43 - 1.72%	1.57 - 1.86%	0.77 - 1.73%
Weighted average grant-date fair value per share	$13.47	$19.26	$14.34