Year	Percent
1950	14.07815
1955	13.83511
1960	13.24905
1965	12.75521
1970	11.97218
1975	11.81541
1980	11.91836
1985	12.17783
1990	12.72132
1995	14.02946
2000	15.30393
2005	16.48202
2010	18.31574
2015	19.07363
2020	19.63763
2025	20.08326
2030	20.69764
2035	21.82003
2040	22.79892
2045	23.54749
2050	24.08222
2055	24.32598
2060	24.61826
2065	25.01276
2070	25.33377
2075	25.52352
2080	25.6046
2085	25.6236
2090	25.59739
2095	25.51449
2100	25.37052