Year	Percent
1990	0
1997	0.00066
1998	0.00427
1999	0.01232
2000	0.03571
2001	0.04593
2002	0.16607
2003	0.32031
2004	0.36092
2005	0.39926
2006	0.58105
2007	0.84722
2008	1.19
2009	1.5
2010	1.7
2011	1.9
2012	2.1
2013	2.5
2014	2.9
2015	3.5
2016	5