Year	Percent
1950	34.93568
1955	32.48784
1960	29.85554
1965	30.25409
1970	30.66649
1975	32.61618
1980	34.73053
1985	35.18922
1990	35.5215
1995	33.94591
2000	32.12027
2005	29.4535
2010	28.34626
2015	28.13643
2020	28.6386
2025	29.04789
2030	28.3277
2035	27.13458
2040	26.14564
2045	25.34552
2050	24.99974
2055	24.63529
2060	24.05028
2065	23.24282
2070	22.41711
2075	21.76194
2080	21.31631
2085	20.9927
2090	20.68697
2095	20.32805
2100	19.95304