Year	Percent
1950	27.21369
1955	27.96474
1960	25.07345
1965	25.22448
1970	24.13084
1975	22.55281
1980	23.07284
1985	22.79553
1990	24.6684
1995	26.75838
2000	28.49465
2005	28.46902
2010	26.94736
2015	27.47165
2020	29.51137
2025	30.23002
2030	30.54893
2035	28.78814
2040	25.04659
2045	23.06962
2050	22.34942
2055	22.23062
2060	23.49493
2065	24.25996
2070	23.71649
2075	23.04315
2080	22.59351
2085	22.60503
2090	22.96738
2095	23.3252
2100	23.25291