Year	Percent
1950	15.83998
1955	14.63338
1960	14.20379
1965	14.47344
1970	14.20763
1975	14.01115
1980	13.629
1985	13.27478
1990	13.52393
1995	14.72948
2000	14.54673
2005	14.55692
2010	16.69902
2015	20.40178
2020	24.44344
2025	27.13172
2030	28.1359
2035	27.62546
2040	26.45362
2045	25.80738
2050	25.88605
2055	26.91599
2060	27.74343
2065	27.96669
2070	27.35343
2075	26.13645
2080	25.34304
2085	25.08303
2090	25.19542
2095	25.31181
2100	25.14081