Year	Percent
1950	27.42421
1955	26.31674
1960	25.9682
1965	24.79856
1970	23.96428
1975	24.50851
1980	25.68575
1985	27.63672
1990	29.41107
1995	30.7448
2000	33.00825
2005	35.50301
2010	36.30672
2015	35.11996
2020	32.09084
2025	28.50643
2030	27.16359
2035	28.04213
2040	29.4409
2045	30.25942
2050	28.9436
2055	26.32315
2060	24.65846
2065	24.10623
2070	24.30855
2075	24.51124
2080	24.18854
2085	23.35393
2090	22.39778
2095	21.78874
2100	21.65856