Year	Percent
1950	27.84494
1955	26.65727
1960	26.26782
1965	25.1254
1970	25.97199
1975	28.17879
1980	29.35269
1985	31.40286
1990	32.14858
1995	32.07879
2000	32.18394
2005	33.06412
2010	33.92258
2015	35.77993
2020	36.13956
2025	34.18253
2030	31.12302
2035	28.54875
2040	27.21508
2045	26.85018
2050	26.67296
2055	25.99467
2060	24.85067
2065	23.64649
2070	22.84414
2075	22.56794
2080	22.58407
2085	22.55366
2090	22.27837
2095	21.82525
2100	21.41435