Year	Percent
1950	8.05583
1955	7.92895
1960	8.92805
1965	10.44664
1970	11.65261
1975	12.22001
1980	10.63157
1985	11.10155
1990	12.3495
1995	12.41303
2000	12.37458
2005	13.01853
2010	14.63725
2015	17.47401
2020	20.01928
2025	22.02785
2030	23.43035
2035	25.6702
2040	28.74504
2045	31.33426
2050	33.38541
2055	34.661
2060	34.57025
2065	33.96726
2070	33.83473
2075	33.91412
2080	34.17262
2085	34.50142
2090	34.69813
2095	34.73348
2100	34.82109