Year	% of total
1990	0
1991	0
1992	0
1993	0
1994	0
1995	0
1996	0
1997	0
1998	0
1999	0
2000	0
2001	0.01392563709789723
2002	0.023129409043598937
2003	0.03717867006585936
2004	0.03732935153583618
2005	0.062434963579604576
2006	0.3146476774033286
2007	1.1878247958426131
2008	1.5007128385983342
2009	1.7755924332445536
2010	7.428914697637165
2011	14.884597268016957
2012	16.780746301611835
2013	23.849074513526343
2014	29.989212513484357
2015	31.21183654297792