Year	Percent
1950	28.46232
1955	27.59662
1960	26.84879
1965	25.34262
1970	24.73207
1975	24.46753
1980	24.04619
1985	24.31352
1990	25.36172
1995	25.41674
2000	26.64923
2005	28.64859
2010	31.59589
2015	34.48933
2020	35.61591
2025	35.09759
2030	34.02803
2035	33.30225
2040	33.21356
2045	33.15526
2050	32.53894
2055	31.5834
2060	30.55666
2065	29.71644
2070	29.01368
2075	28.30026
2080	27.49873
2085	26.67427
2090	25.92722
2095	25.30719
2100	24.80193