Year	Percent
1950	26.64564
1955	26.54879
1960	24.96398
1965	23.4743
1970	22.72024
1975	22.62701
1980	23.69629
1985	24.30737
1990	25.24473
1995	25.44764
2000	26.6436
2005	28.09373
2010	29.06035
2015	29.03284
2020	28.30145
2025	27.35393
2030	26.1745
2035	25.77538
2040	25.31178
2045	24.10456
2050	23.13834
2055	22.69535
2060	22.93257
2065	23.35006
2070	23.57057
2075	23.40277
2080	22.94089
2085	22.55072
2090	22.3533
2095	22.31908
2100	22.29981