Year	Percent
1950	9.75276
1955	9.62622
1960	9.85001
1965	11.12899
1970	12.64835
1975	14.03089
1980	13.58845
1985	14.18425
1990	18.29874
1995	18.29327
2000	20.68297
2005	20.37241
2010	20.96248
2015	22.4807
2020	24.02102
2025	25.5643
2030	26.28293
2035	27.51019
2040	29.22588
2045	31.46384
2050	33.62454
2055	33.96195
2060	32.98813
2065	31.70248
2070	31.68525
2075	32.02649
2080	32.40832
2085	32.69748
2090	32.82309
2095	32.89216
2100	33.13763