Year	Percent
1990	0.01754
1991	0.03506
1992	0.07005
1993	0.12246
1994	0.1923
1995	0.52441
1996	1.02329
1997	2.27674
1998	4.55852
1999	14.37841
2000	23.11087
2001	27.22212
2002	28.04
2003	29.04
2004	33.24
2005	35
2006	37.99
2007	40.79
2008	44.53
2009	48.83
2010	53.68
2011	54.39
2012	55.83
2013	58.4593
2014	55.63846
2015	58.14173
2016	61.32425
2017	61.30114