Year	Percent
1950	16.00036
1955	15.41166
1960	14.06467
1965	14.37701
1970	14.65634
1975	14.6674
1980	14.4431
1985	14.59055
1990	14.81414
1995	14.51291
2000	14.83386
2005	15.53066
2010	15.96255
2015	16.15186
2020	16.08078
2025	15.93564
2030	15.77781
2035	15.52681
2040	15.17412
2045	14.72902
2050	14.21287
2055	13.64302
2060	13.04682
2065	12.43938
2070	11.83228
2075	11.21254
2080	10.66119
2085	10.09794
2090	9.58952
2095	9.11498
2100	8.66831