Year	Percent
1994	15.20404
1995	17.60216
1996	8.98662
1997	19.8103
1998	22.22904
1999	30.55273
2000	30.28112
2001	30.99859
2002	23.18174
2003	21.95592
2004	34.47389
2005	46.10173
2006	43.10001
2007	45.34567
2008	48.69954
2009	50.11887
2010	40.42706
2011	41.69031
2012	34.96727
2013	35.55922
2014	34.69072
2015	33.23283
2016	32.30623