Year	% of population
1990	0
1991	0
1992	0
1993	0
1994	0
1995	0
1996	0.00150955
1997	0.002948713
1998	0.00716442
1999	0.013910394
2000	0.02
2001	0.079039179
2002	0.115614213
2003	0.376198003
2004	1.053454744
2005	1.077327839
2006	1.100216368
2007	1.122235622
2008	1.142687372
2009	1.160610542
2011	1.25
2012	1.3767
2013	1.5
2014	1.63
2015	1.76
2016	1.88
2017	2.004048698