Year	Percent
1950	28.14054
1955	30.80597
1960	34.55529
1965	32.43875
1970	28.57044
1975	28.22758
1980	27.75586
1985	30.76814
1990	31.32048
1995	30.8141
2000	29.57086
2005	28.99977
2010	29.83745
2015	29.28356
2020	28.20455
2025	26.68358
2030	25.79025
2035	26.02154
2040	26.71416
2045	27.33299
2050	26.43103
2055	24.76985
2060	23.97533
2065	24.03234
2070	24.37069
2075	24.37448
2080	23.84898
2085	23.06948
2090	22.51315
2095	22.39113
2100	22.52941