Year	Percent
1995	68.51849
1996	62.23219
1997	68.35736
1998	70.67285
1999	74.13436
2000	72.74212
2001	67.55002
2002	66.50426
2003	64.76785
2004	66.72323
2005	66.60825
2006	67.29685
2007	68.1073
2008	72.02186
2009	70.70023
2010	73.41397
2011	72.46802
2012	72.42671
2013	72.79853
2014	72.46866
2015	72.0242
2016	71.98706
2017	72.43324