Year	Percent
1995	16.0144
2000	12.3711
2001	13.7756
2002	17.0134
2003	18.2287
2004	20.0312
2005	22.2124
2006	20.5166
2007	19.0628
2008	24.161
2009	26.3839
2010	26.7553
2011	28.374
2012	32.9043
2013	35.0365
2014	38.4426
2015	39.0601
2016	44.75
2017	47.3925