Year	Percent
1950	25.69766
1955	26.72593
1960	24.24826
1965	25.54711
1970	25.47945
1975	24.67582
1980	25.9243
1985	25.05549
1990	25.11066
1995	26.69718
2000	27.87246
2005	27.13098
2010	27.60259
2015	26.97477
2020	27.94422
2025	28.7671
2030	28.66077
2035	27.91613
2040	25.67794
2045	24.85826
2050	24.42881
2055	23.24309
2060	23.1616
2065	23.28125
2070	23.20384
2075	23.27268
2080	23.1994
2085	23.07238
2090	22.92784
2095	22.8615
2100	22.82022