Year	Percent
1950	23.09211
1955	23.72219
1960	23.67705
1965	21.35738
1970	19.51322
1975	21.923
1980	23.76429
1985	29.58486
1990	26.06253
1995	27.56034
2000	27.89575
2005	29.22123
2010	33.34861
2015	34.95295
2020	34.35412
2025	31.60688
2030	28.34248
2035	27.25429
2040	27.0281
2045	26.95704
2050	25.6423
2055	23.65845
2060	21.9477
2065	21.0875
2070	20.94974
2075	20.91539
2080	20.50407
2085	19.76778
2090	19.09999
2095	18.81887
2100	18.91516