Year	Percent
1950	27.40653
1955	25.91446
1960	24.77385
1965	23.05336
1970	20.08964
1975	20.53392
1980	17.01765
1985	22.3862
1990	24.7829
1995	26.78275
2000	27.71393
2005	30.25041
2010	33.33721
2015	35.56977
2020	36.62151
2025	35.61075
2030	33.77003
2035	31.98965
2040	30.65789
2045	29.72271
2050	28.78706
2055	27.79974
2060	26.62473
2065	25.50918
2070	24.62565
2075	23.96999
2080	23.45327
2085	22.98937
2090	22.54021
2095	22.14016
2100	21.82416