Year	Percent
1950	12.75576
1955	13.41893
1960	13.90493
1965	13.96836
1970	13.24001
1975	13.49515
1980	14.01519
1985	14.59842
1990	14.88598
1995	16.38786
2000	18.31789
2005	21.08837
2010	24.23656
2015	25.17431
2020	25.8717
2025	26.2647
2030	25.89267
2035	25.82012
2040	25.94513
2045	25.84172
2050	25.39215
2055	25.2415
2060	24.90959
2065	24.51124
2070	24.3807
2075	23.86237
2080	23.41503
2085	23.12473
2090	22.87196
2095	22.64063
2100	22.41138