Year	Percent
1950	12.11493
1955	12.03309
1960	13.58209
1965	13.65113
1970	13.65369
1975	13.77491
1980	14.53805
1985	15.0215
1990	15.28802
1995	15.54667
2000	15.86157
2005	16.0285
2010	15.97971
2015	15.67053
2020	15.26476
2025	14.78968
2030	14.25683
2035	13.66786
2040	13.03814
2045	12.41489
2050	11.80198
2055	11.2204
2060	10.67821
2065	10.18571
2070	9.7311
2075	9.30745
2080	8.90117
2085	8.53211
2090	8.18277
2095	7.85306
2100	7.55943