Year	Percent
1950	26.52478
1955	28.08597
1960	26.71223
1965	26.42075
1970	24.91792
1975	24.41708
1980	25.56689
1985	26.50687
1990	29.52403
1995	27.62917
2000	27.46885
2005	29.14065
2010	28.40009
2015	27.26392
2020	28.25184
2025	29.99663
2030	32.17546
2035	32.06025
2040	30.86213
2045	29.40603
2050	28.43003
2055	28.45011
2060	28.96698
2065	29.00144
2070	28.26878
2075	27.14542
2080	26.21767
2085	25.81055
2090	25.78203
2095	25.69464
2100	25.21869