Year	Percent
1950	10.60912
1955	10.30713
1960	9.94552
1965	9.79756
1970	9.63793
1975	10.32021
1980	10.91279
1985	11.7775
1990	13.76472
1995	14.27647
2000	15.10238
2005	16.24985
2010	17.90252
2015	19.39457
2020	20.86205
2025	22.41988
2030	23.48497
2035	24.549
2040	25.09824
2045	26.08074
2050	27.02655
2055	27.81939
2060	28.18987
2065	28.51628
2070	29.19933
2075	29.95801
2080	30.81302
2085	31.55939
2090	32.23372
2095	32.87295
2100	33.55441