Year	Percent
1950	9.78254
1955	9.45136
1960	10.23748
1965	10.74565
1970	11.05661
1975	11.25283
1980	10.20504
1985	9.96013
1990	12.41721
1995	14.36838
2000	15.984
2005	16.66656
2010	17.695
2015	19.38803
2020	21.23354
2025	23.06595
2030	24.46829
2035	26.60414
2040	28.48045
2045	30.49026
2050	32.92916
2055	33.45192
2060	32.40191
2065	31.88546
2070	32.65579
2075	32.95851
2080	33.38601
2085	33.72652
2090	33.81908
2095	33.88483
2100	34.18373