Year	Percent
1950	14.0747
1955	13.41148
1960	14.29867
1965	13.55513
1970	12.49423
1975	11.54977
1980	12.19611
1985	12.66607
1990	12.06903
1995	13.36902
2000	15.5914
2005	19.63964
2010	21.87685
2015	23.39123
2020	24.1922
2025	24.4719
2030	25.47726
2035	26.51649
2040	27.08722
2045	26.93976
2050	27.0588
2055	26.79933
2060	26.44451
2065	26.19319
2070	25.47678
2075	24.8389
2080	24.26628
2085	23.88905
2090	23.66165
2095	23.49155
2100	23.25041