Year	Percent
1950	14.71179
1955	15.52829
1960	15.32012
1965	13.95831
1970	13.53394
1975	11.9538
1980	12.69165
1985	14.39196
1990	13.4071
1995	16.51612
2000	19.13046
2005	20.09904
2010	25.54273
2015	27.5282
2020	26.75768
2025	26.00051
2030	23.90758
2035	23.71847
2040	25.11296
2045	25.60273
2050	25.73329
2055	25.44016
2060	25.04144
2065	24.86125
2070	24.83144
2075	24.69999
2080	24.38365
2085	23.97744
2090	23.64046
2095	23.45404
2100	23.38221