Year	Percent
1950	14.17073
1955	12.93291
1960	13.77749
1965	14.02157
1970	14.1372
1975	14.22785
1980	14.45937
1985	14.58039
1990	14.69504
1995	14.22233
2000	13.63688
2005	14.1355
2010	14.36847
2015	13.97148
2020	13.35703
2025	12.90436
2030	12.51259
2035	12.09579
2040	11.63665
2045	11.15633
2050	10.66986
2055	10.20234
2060	9.76712
2065	9.34538
2070	8.95859
2075	8.56875
2080	8.19154
2085	7.83642
2090	7.49837
2095	7.18865
2100	6.88936