Year	Percent
1950	27.54056
1955	27.97576
1960	28.47911
1965	28.05088
1970	27.15826
1975	26.92381
1980	27.77781
1985	29.01084
1990	30.33033
1995	31.509
2000	32.42857
2005	33.03643
2010	32.90509
2015	31.76955
2020	30.92334
2025	29.90534
2030	28.91712
2035	28.15564
2040	27.09781
2045	26.03561
2050	24.99902
2055	23.97209
2060	23.12448
2065	22.50324
2070	22.04914
2075	21.63746
2080	21.25098
2085	20.89065
2090	20.59635
2095	20.40252
2100	20.28242