Year	Percent
1950	10.70878
1955	10.80748
1960	10.96219
1965	11.40157
1970	12.00638
1975	13.30705
1980	13.82653
1985	14.61012
1990	18.35451
1995	19.25385
2000	19.73704
2005	20.39659
2010	21.17849
2015	21.92158
2020	22.98284
2025	24.06699
2030	24.93775
2035	26.21892
2040	27.72915
2045	28.73655
2050	30.01671
2055	31.58568
2060	32.96663
2065	34.08276
2070	35.0462
2075	35.90814
2080	36.69041
2085	37.41715
2090	38.0337
2095	38.52839
2100	38.95316