Year	Percent
1950	25.31652
1955	26.03005
1960	24.55443
1965	24.59824
1970	25.10387
1975	25.0583
1980	26.88206
1985	25.53235
1990	24.54952
1995	25.55431
2000	25.99832
2005	27.07245
2010	26.63489
2015	26.24086
2020	25.62337
2025	25.72658
2030	26.93398
2035	26.11962
2040	24.13715
2045	22.20323
2050	20.92688
2055	21.03355
2060	22.57675
2065	23.31613
2070	22.38309
2075	21.64227
2080	21.16279
2085	21.21808
2090	21.72554
2095	22.11862
2100	21.98652