Year	Percent
1950	14.72237
1955	14.23383
1960	13.71635
1965	11.38253
1970	12.57967
1975	13.4968
1980	12.46182
1985	13.61969
1990	17.15576
1995	18.06221
2000	18.65084
2005	19.24854
2010	21.5085
2015	27.66748
2020	30.02307
2025	30.72792
2030	31.27215
2035	30.53781
2040	30.92563
2045	31.62712
2050	32.15512
2055	32.46356
2060	31.32058
2065	29.8833
2070	28.30686
2075	27.13309
2080	26.85283
2085	26.72786
2090	26.46952
2095	26.11173
2100	25.74338