Year	Percent
1995	35.89412
1996	37.25924
1997	44.2274
1998	36.27765
1999	36.51041
2000	39.5519
2001	42.18235
2002	45.54751
2003	46.32903
2004	45.47052
2005	45.43226
2006	46.40243
2007	46.2679
2008	46.51739
2009	38.23846
2010	38.05549
2011	40.7771
2012	41.04295
2013	42.33504
2014	43.39308
2015	45.85553
2016	46.19444
2017	49.09601