Year	Percent
1950	11.7177
1955	11.78437
1960	11.44804
1965	11.54257
1970	11.73431
1975	11.82481
1980	12.01306
1985	12.00713
1990	12.49237
1995	12.70703
2000	12.51381
2005	12.45657
2010	12.48377
2015	12.60651
2020	12.77852
2025	12.4991
2030	12.12409
2035	11.77158
2040	11.46845
2045	11.15034
2050	10.78854
2055	10.37567
2060	9.94968
2065	9.56239
2070	9.18466
2075	8.84548
2080	8.5184
2085	8.19051
2090	7.87649
2095	7.58091
2100	7.28677