Year	Percent
1950	13.63063
1955	14.53981
1960	14.83993
1965	15.39474
1970	15.57296
1975	15.73967
1980	15.61275
1985	15.80917
1990	15.6398
1995	14.65307
2000	14.37658
2005	13.99798
2010	12.62561
2015	11.95146
2020	12.26041
2025	11.94365
2030	11.251
2035	10.49389
2040	9.93628
2045	9.48283
2050	9.04854
2055	8.57968
2060	8.14303
2065	7.74855
2070	7.38797
2075	7.09896
2080	6.84494
2085	6.60659
2090	6.39516
2095	6.20429
2100	6.0449