Year	Percent
1950	12.36679
1955	11.92673
1960	10.69973
1965	13.53665
1970	14.01641
1975	12.97379
1980	12.70832
1985	13.12265
1990	13.39045
1995	13.58257
2000	13.02217
2005	12.03935
2010	10.95006
2015	9.929
2020	9.38656
2025	8.67298
2030	8.03029
2035	7.3615
2040	6.7979
2045	6.32905
2050	5.96244
2055	5.65392
2060	5.38542
2065	5.15978
2070	4.96508
2075	4.82652
2080	4.7254
2085	4.65118
2090	4.60397
2095	4.56294
2100	4.53172