Year	Percent
1950	12.42649
1955	12.34425
1960	13.55362
1965	13.74665
1970	13.83552
1975	14.00965
1980	14.78428
1985	15.26908
1990	15.50081
1995	15.73754
2000	16.00829
2005	16.15575
2010	16.10784
2015	15.77566
2020	15.35677
2025	14.88638
2030	14.36004
2035	13.75496
2040	13.11608
2045	12.49343
2050	11.88435
2055	11.31045
2060	10.77588
2065	10.29146
2070	9.84615
2075	9.43713
2080	9.04608
2085	8.69045
2090	8.35463
2095	8.03825
2100	7.75848