Year	Percent
1950	16.51422
1955	15.73714
1960	15.73958
1965	15.81788
1970	14.95718
1975	12.97301
1980	10.21311
1985	8.59148
1990	8.1973
1995	7.87793
2000	7.51716
2005	7.07619
2010	5.8415
2015	5.4007
2020	4.82705
2025	4.86696
2030	5.10748
2035	5.09696
2040	4.81951
2045	4.50547
2050	4.31194
2055	4.31389
2060	4.46401
2065	4.58141
2070	4.55129
2075	4.4042
2080	4.25702
2085	4.19597
2090	4.22121
2095	4.28157
2100	4.29564