Year	Percent
1950	18.1379
1955	18.83958
1960	18.47259
1965	18.37763
1970	18.10204
1975	18.51798
1980	18.89804
1985	19.61767
1990	20.68482
1995	22.2056
2000	23.80922
2005	24.57731
2010	24.32764
2015	24.49109
2020	25.59399
2025	26.5644
2030	27.91402
2035	28.80074
2040	29.1908
2045	28.95369
2050	27.83005
2055	26.83961
2060	25.68965
2065	24.61438
2070	23.96939
2075	23.38412
2080	23.09552
2085	23.11196
2090	23.16333
2095	23.10193
2100	22.9014