Year	Percent
1950	22.94385
1955	22.94235
1960	22.98702
1965	22.70316
1970	22.26956
1975	21.26738
1980	20.16415
1985	19.93037
1990	21.28294
1995	23.52147
2000	26.09372
2005	27.83481
2010	27.62683
2015	26.4494
2020	24.87106
2025	23.82903
2030	23.80687
2035	24.42603
2040	24.8376
2045	24.93373
2050	24.7284
2055	23.99652
2060	23.67203
2065	23.54466
2070	23.41686
2075	23.5138
2080	23.41298
2085	23.16258
2090	22.91574
2095	22.76918
2100	22.71139