Year	Percent
1950	15.61613
1955	15.42844
1960	15.21283
1965	14.91771
1970	14.71327
1975	13.92347
1980	12.83831
1985	11.98509
1990	11.68784
1995	11.96109
2000	12.66074
2005	13.30777
2010	13.75879
2015	14.40331
2020	15.24663
2025	16.1453
2030	17.63241
2035	19.44253
2040	20.82773
2045	21.69256
2050	22.15689
2055	22.83693
2060	23.61513
2065	24.47721
2070	25.12609
2075	25.20951
2080	25.22902
2085	25.30311
2090	25.42744
2095	25.50415
2100	25.4563