Year	% of population
1960	0
1965	0
1970	0
1975	0
1976	0
1977	0
1978	0
1979	0
1980	0
1981	0
1982	0
1983	0
1984	0
1985	0
1986	0
1987	0
1988	0
1989	0
1990	0
1991	0
1992	0
1993	0
1994	0
1995	0
1996	0
1997	0.032607814
1998	0.063687286
1999	0.124295462
2000	0.18169858
2001	0.35375913
2002	2.093101019
2003	3.397972614
2004	4.321593778
2005	5.648106049
2006	7.832551569
2007	11.5
2008	14
2009	17.3
2010	20.7
2011	22.5
2012	24.3001
2013	26.2
2014	28.09
2015	29.97979724
2016	31.86962727
2017	32.7
2018	33.77
2019	34.65
2020	35.78