Year	Percent
1950	16.43033
1955	15.25008
1960	14.06302
1965	13.15435
1970	12.94107
1975	12.57185
1980	12.51216
1985	12.03554
1990	13.23958
1995	14.65366
2000	15.8582
2005	18.91947
2010	20.08958
2015	21.51997
2020	22.1281
2025	21.84155
2030	20.63039
2035	22.19369
2040	24.1004
2045	25.90616
2050	27.60097
2055	27.06236
2060	26.46723
2065	26.36966
2070	26.81184
2075	26.85194
2080	26.57905
2085	26.26893
2090	26.02152
2095	25.83578
2100	25.65738