Year	Percent
1950	14.60173
1955	14.13763
1960	13.81732
1965	13.44883
1970	13.01898
1975	12.51832
1980	11.87711
1985	11.16613
1990	10.47605
1995	10.77731
2000	10.97743
2005	11.17172
2010	11.31583
2015	11.33967
2020	11.66708
2025	12.01001
2030	12.44832
2035	12.85
2040	13.29744
2045	14.06741
2050	15.09439
2055	16.16246
2060	17.15259
2065	18.00678
2070	18.7451
2075	19.47972
2080	20.22261
2085	20.90854
2090	21.50567
2095	22.02349
2100	22.48479