Year	Percent
1950	14.00157
1955	13.90567
1960	13.84867
1965	13.59614
1970	13.18059
1975	12.62582
1980	12.04248
1985	11.70754
1990	11.99261
1995	11.91014
2000	12.52788
2005	12.59931
2010	12.85611
2015	13.05076
2020	13.69985
2025	15.35156
2030	17.96021
2035	20.63966
2040	22.4308
2045	23.17953
2050	23.50872
2055	23.95032
2060	24.75663
2065	25.54686
2070	25.87384
2075	25.8615
2080	25.70993
2085	25.62691
2090	25.5773
2095	25.4453
2100	25.1756