Year	Percent
1950	27.5725
1955	26.05565
1960	24.96398
1965	24.45625
1970	24.82116
1975	24.71183
1980	25.56419
1985	25.6006
1990	26.17165
1995	27.63037
2000	28.0302
2005	29.53959
2010	31.58206
2015	34.06519
2020	35.45052
2025	34.94885
2030	33.93572
2035	33.55421
2040	33.22156
2045	33.13787
2050	32.80711
2055	31.84289
2060	30.79573
2065	29.94978
2070	29.2903
2075	28.65703
2080	27.97024
2085	27.22978
2090	26.53204
2095	25.90316
2100	25.34588