Years ended
December 31,	SARS		Options
Exercise price
2018		$23.59		$18.86	-	$24.28
2017		$16.97		$16.97	-	$21.63
2016		$16.35		$16.35	-	$18.55

Market price
2018		$23.59		$18.86	-	$24.28
2017		$16.97		$16.97	-	$21.63
2016		$16.35		$16.35	-	$18.55

Risk free interest rate 1
2018		2.6%		2.6%	-	2.9%
2017		1.9%		1.8%	-	2.4%
2016		1.3%		1.1%	-	1.8%

Expected award life (years) 2
2018		3		3	-	10
2017		5		5	-	10
2016		5		5	-	10

Expected volatility 3
2018		38.1%		35.4%	-	42.1%
2017		36.6%		36.6%	-	41.4%
2016		36.5%		36.5%	-	40.3%

Expected dividend yield 4
2018		1.6%		1.6%	-	2.1%
2017		2.1%		1.8%	-	2.1%
2016		2.0%		1.8%	-	2.1%

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