Year	Percent
1950	13.67654
1955	13.62826
1960	13.23431
1965	13.60349
1970	13.8985
1975	13.95635
1980	14.35268
1985	14.89363
1990	14.92863
1995	14.51596
2000	14.19762
2005	14.29361
2010	14.63617
2015	14.70443
2020	14.63217
2025	14.15094
2030	13.64801
2035	13.22053
2040	12.81868
2045	12.38575
2050	11.90116
2055	11.39557
2060	10.9214
2065	10.44599
2070	10.02601
2075	9.64025
2080	9.2542
2085	8.8772
2090	8.51385
2095	8.19121
2100	7.8802