Year	Percent
1950	29.65474
1955	28.97791
1960	27.44852
1965	25.29139
1970	23.3659
1975	23.06111
1980	24.03828
1985	26.96707
1990	29.65682
1995	32.42003
2000	34.53243
2005	35.73902
2010	37.40958
2015	35.69439
2020	32.689
2025	29.34927
2030	26.92516
2035	28.11175
2040	29.90164
2045	31.15681
2050	30.44841
2055	27.94909
2060	26.4399
2065	26.10252
2070	26.50584
2075	26.84639
2080	26.55242
2085	25.65637
2090	24.57132
2095	23.8406
2100	23.66699