Year	Percent
1950	14.54826
1955	16.67448
1960	16.50382
1965	16.22118
1970	16.03616
1975	16.43661
1980	17.05799
1985	17.50981
1990	17.65392
1995	17.57508
2000	17.33917
2005	17.03928
2010	16.67206
2015	16.06242
2020	15.40973
2025	14.72021
2030	14.00654
2035	13.28793
2040	12.57375
2045	11.90442
2050	11.26873
2055	10.65905
2060	10.09641
2065	9.56694
2070	9.07875
2075	8.62004
2080	8.20203
2085	7.80369
2090	7.44002
2095	7.09801
2100	6.79649