Year	Percent
1950	13.64718
1955	13.17819
1960	13.51903
1965	13.44748
1970	13.3036
1975	13.30189
1980	12.717
1985	12.54082
1990	14.44763
1995	14.3921
2000	14.51927
2005	14.84079
2010	16.07617
2015	18.4462
2020	20.15846
2025	22.32104
2030	24.2285
2035	26.74488
2040	29.00344
2045	30.57529
2050	30.83885
2055	30.43637
2060	30.29495
2065	30.76956
2070	31.8286
2075	32.84728
2080	33.52625
2085	33.96493
2090	34.37818
2095	34.92501
2100	35.58837