Year	Percent
1950	13.98045
1955	14.57581
1960	12.58545
1965	11.86416
1970	11.75082
1975	12.64023
1980	12.24079
1985	11.21283
1990	10.73213
1995	9.90798
2000	10.21311
2005	10.09311
2010	9.95792
2015	10.29284
2020	9.43409
2025	8.81608
2030	8.43903
2035	8.27156
2040	8.16037
2045	7.98429
2050	7.65945
2055	7.26526
2060	6.89697
2065	6.62774
2070	6.4456
2075	6.27739
2080	6.08842
2085	5.86193
2090	5.63271
2095	5.43949
2100	5.29431