Year	Percent
1950	15.45825
1955	16.95008
1960	17.1609
1965	17.28552
1970	17.64353
1975	18.70375
1980	19.35551
1985	19.67515
1990	20.01567
1995	20.3225
2000	20.39516
2005	20.14532
2010	19.46843
2015	18.70513
2020	17.90306
2025	17.05902
2030	16.13725
2035	15.20346
2040	14.313
2045	13.46218
2050	12.67585
2055	11.95666
2060	11.31113
2065	10.72014
2070	10.18154
2075	9.67679
2080	9.22126
2085	8.79728
2090	8.40484
2095	8.05851
2100	7.73114