Year	Percent
1950	11.23047
1955	11.42092
1960	11.57741
1965	11.60502
1970	11.71106
1975	11.95692
1980	12.22251
1985	12.55372
1990	12.82344
1995	13.14415
2000	12.74738
2005	11.98935
2010	11.7475
2015	12.14336
2020	12.27235
2025	11.85446
2030	11.33074
2035	10.92532
2040	10.66886
2045	10.42211
2050	10.13208
2055	9.80277
2060	9.45884
2065	9.1596
2070	8.86647
2075	8.6082
2080	8.33648
2085	8.06064
2090	7.80236
2095	7.5588
2100	7.3047