Year	Percent
1950	30.22738
1955	29.01092
1960	28.00133
1965	27.1119
1970	26.51403
1975	26.01329
1980	25.38369
1985	24.97608
1990	25.34328
1995	26.05156
2000	26.89891
2005	27.67747
2010	27.994
2015	28.28954
2020	28.63021
2025	29.19639
2030	30.06284
2035	30.8019
2040	31.28386
2045	31.51948
2050	31.57627
2055	31.62214
2060	31.66072
2065	31.60465
2070	31.39631
2075	31.08647
2080	30.70696
2085	30.3263
2090	29.96074
2095	29.56998
2100	29.15418