Year	Percent
1950	27.99017
1955	27.26895
1960	26.40796
1965	25.8565
1970	24.75615
1975	25.48083
1980	26.37026
1985	26.48042
1990	27.10015
1995	27.99251
2000	29.32206
2005	31.47639
2010	33.50826
2015	34.68713
2020	34.84303
2025	33.92269
2030	32.86119
2035	31.65033
2040	30.36306
2045	29.0158
2050	27.4226
2055	25.89851
2060	24.55445
2065	23.48665
2070	22.64514
2075	21.99037
2080	21.44887
2085	21.01015
2090	20.66897
2095	20.4142
2100	20.25368