Year	Percent
1950	26.32395
1955	27.06176
1960	27.18612
1965	26.91159
1970	25.21584
1975	23.4582
1980	22.3976
1985	22.76623
1990	24.33278
1995	25.24586
2000	26.30379
2005	26.34468
2010	25.63398
2015	25.60081
2020	24.97788
2025	24.34845
2030	24.07997
2035	24.66058
2040	24.18881
2045	23.78439
2050	23.18755
2055	22.23938
2060	22.92859
2065	23.44787
2070	23.34928
2075	23.03906
2080	22.59401
2085	22.2712
2090	22.21274
2095	22.29209
2100	22.25962