Year	Percent
1950	30.428
1955	28.92726
1960	27.64209
1965	27.42874
1970	26.90841
1975	27.09288
1980	26.7724
1985	25.97441
1990	24.96109
1995	25.40275
2000	26.34271
2005	27.17571
2010	27.06389
2015	26.50561
2020	26.47938
2025	27.21547
2030	28.58239
2035	29.7755
2040	30.68447
2045	31.26498
2050	31.59196
2055	31.89743
2060	32.11057
2065	32.07244
2070	31.75575
2075	31.26621
2080	30.69071
2085	30.11502
2090	29.54579
2095	28.94918
2100	28.34164