Three months ended
June 30,	SARS		Options

Exercise price
2018		N/A	$	24.28
2017		N/A	$	18.05

Market price
2018		N/A	$	24.28
2017		N/A	$	18.05

Risk free interest rate 1
2018		N/A		2.9	%
2017		N/A		2.4	%

Expected award life (years) 2
2018		N/A		10
2017		N/A		10

Expected volatility 3
2018		N/A		42.1	%
2017		N/A		41.4	%

Expected dividend yield 4
2018		N/A		1.6	%
2017		N/A		1.9	%

Six months ended
June 30,	SARS			Options

Exercise price
2018	$	23.59			$23.59	-	$24.28
2017	$	16.97			$16.97	-	$18.05

Market price
2018	$	23.59			$23.59	-	$24.28
2017	$	16.97			$16.97	-	$18.05

Risk free interest rate 1
2018		2.6	%		2.6%	-	2.9%
2017		1.9	%		1.9%	-	2.4%

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

Expected volatility 3
2018		38.1	%		38.1%	-	42.1%
2017		36.6	%		36.6%	-	41.4%

Expected dividend yield 4
2018		1.6	%			1.6%
2017		2.1	%		1.9%	-	2.1%

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