Year	Percent
1950	10.92277
1955	10.32438
1960	12.02775
1965	13.30863
1970	13.53899
1975	12.60455
1980	12.09217
1985	12.38688
1990	13.17961
1995	14.84393
2000	14.09355
2005	11.7213
2010	11.76366
2015	11.85197
2020	12.04477
2025	11.4984
2030	10.71209
2035	9.92172
2040	9.44334
2045	9.1594
2050	8.83457
2055	8.34922
2060	7.78355
2065	7.27858
2070	6.89139
2075	6.57708
2080	6.29842
2085	6.00576
2090	5.72828
2095	5.4978
2100	5.33066