Year	Percent
1950	16.9308
1955	18.36882
1960	19.02308
1965	19.59772
1970	20.49422
1975	20.22712
1980	19.13235
1985	17.95885
1990	18.85849
1995	21.91693
2000	26.18547
2005	32.21438
2010	33.60617
2015	33.92015
2020	32.87054
2025	31.97774
2030	31.13527
2035	29.83896
2040	27.04728
2045	22.95874
2050	20.18535
2055	18.26294
2060	18.51014
2065	20.16895
2070	21.48844
2075	22.14674
2080	21.73162
2085	21.0212
2090	20.51903
2095	20.76957
2100	21.39018