Year	Percent
1950	15.37196
1955	14.49888
1960	14.18825
1965	14.31917
1970	13.93416
1975	13.51562
1980	13.07906
1985	12.69083
1990	12.67086
1995	13.56533
2000	13.72788
2005	14.32401
2010	16.76624
2015	20.38939
2020	24.35064
2025	27.09725
2030	28.28896
2035	27.87727
2040	26.65503
2045	25.80774
2050	25.64698
2055	26.47395
2060	27.17686
2065	27.34189
2070	26.70809
2075	25.50426
2080	24.72343
2085	24.4638
2090	24.5714
2095	24.69147
2100	24.54531