Year	Percent
1950	14.09927
1955	13.89921
1960	13.04956
1965	12.27192
1970	11.40261
1975	11.39187
1980	11.58147
1985	11.97015
1990	12.5949
1995	13.84399
2000	15.0845
2005	16.1947
2010	18.21988
2015	18.90748
2020	19.42128
2025	19.79896
2030	20.38472
2035	21.50171
2040	22.57999
2045	23.49667
2050	24.11734
2055	24.47954
2060	24.82905
2065	25.24825
2070	25.65736
2075	25.9162
2080	26.05693
2085	26.12766
2090	26.14554
2095	26.09633
2100	25.97348