Year	Percent
1950	9.93717
1955	9.98096
1960	11.07646
1965	12.50026
1970	13.66383
1975	14.50564
1980	13.01298
1985	13.92146
1990	16.82193
1995	17.47782
2000	17.97572
2005	19.0243
2010	20.81967
2015	23.73954
2020	26.37592
2025	28.47887
2030	29.94526
2035	32.03558
2040	34.78322
2045	37.05802
2050	38.88671
2055	39.92999
2060	39.65226
2065	38.87681
2070	38.51375
2075	38.29721
2080	38.21531
2085	38.21904
2090	38.17405
2095	38.07458
2100	38.10838