Year	Percent
1950	29.14645
1955	28.41399
1960	28.71328
1965	26.37805
1970	26.66605
1975	27.62636
1980	29.63723
1985	32.01923
1990	31.84929
1995	31.00271
2000	29.184
2005	27.47125
2010	26.67363
2015	26.10295
2020	25.41407
2025	24.48998
2030	23.98246
2035	23.57382
2040	23.70861
2045	23.81227
2050	23.53497
2055	23.16861
2060	22.85006
2065	22.75113
2070	22.79171
2075	22.85994
2080	22.80103
2085	22.59316
2090	22.3279
2095	22.10164
2100	21.96089