Year	Percent
1950	13.27327
1955	13.84389
1960	14.62675
1965	15.68053
1970	16.66186
1975	16.67707
1980	15.55854
1985	15.57713
1990	18.99835
1995	18.99257
2000	18.82697
2005	19.00459
2010	18.95434
2015	19.1269
2020	20.54942
2025	22.4211
2030	24.64482
2035	26.0885
2040	27.03947
2045	28.20396
2050	28.81485
2055	29.22866
2060	29.6595
2065	29.95627
2070	30.18967
2075	30.58893
2080	31.22162
2085	31.90762
2090	32.60105
2095	33.29171
2100	33.97536