Year	Percent
1990	0
1996	0.00883
1997	0.01724
1998	0.02523
1999	0.04104
2000	0.06408
2001	0.0899
2002	0.32046
2003	0.55858
2004	1.28614
2005	3.54916
2006	5.54504
2007	6.77
2008	8
2009	9.3
2010	11.5
2011	13.8
2012	16.1
2013	19.1
2014	21
2015	24.5
2016	25.67