Year	Percent
1950	27.35067
1955	29.68325
1960	32.05858
1965	33.98696
1970	32.78635
1975	28.73369
1980	29.66406
1985	29.08424
1990	31.86858
1995	35.56755
2000	32.98162
2005	32.2136
2010	29.55487
2015	27.7078
2020	28.20002
2025	27.72693
2030	26.6718
2035	25.27901
2040	24.37239
2045	23.83911
2050	23.79295
2055	23.63819
2060	23.16023
2065	22.53819
2070	22.05988
2075	21.86685
2080	21.86691
2085	21.83745
2090	21.63263
2095	21.31281
2100	21.04498