Year	Percent
1950	33.87987
1955	28.87785
1960	27.32874
1965	25.42842
1970	26.33878
1975	28.25927
1980	28.97882
1985	29.64808
1990	29.04802
1995	28.58469
2000	28.47601
2005	28.54895
2010	28.61796
2015	27.33406
2020	26.37172
2025	25.96781
2030	26.27334
2035	27.23635
2040	27.49985
2045	27.33052
2050	26.77823
2055	25.94301
2060	25.57449
2065	25.49603
2070	25.40989
2075	25.09682
2080	24.52229
2085	23.81845
2090	23.18969
2095	22.71469
2100	22.37548