Year	Percent
1950	12.63801
1955	13.17753
1960	13.61336
1965	13.67664
1970	13.76177
1975	13.95252
1980	14.62055
1985	14.11283
1990	13.94856
1995	14.54238
2000	15.1782
2005	15.98517
2010	15.37286
2015	15.24621
2020	14.90178
2025	14.84286
2030	14.50878
2035	14.07362
2040	13.57009
2045	13.04222
2050	12.54687
2055	12.07653
2060	11.57009
2065	11.06018
2070	10.55673
2075	10.09794
2080	9.66228
2085	9.25301
2090	8.8539
2095	8.46698
2100	8.085