Year	Percent
1950	9.36177
1955	8.23794
1960	9.07291
1965	8.07568
1970	8.08595
1975	8.64451
1980	8.51463
1985	7.92953
1990	6.564
1995	5.6132
2000	5.22919
2005	5.05909
2010	4.91082
2015	4.97258
2020	5.02043
2025	4.62338
2030	4.43223
2035	4.35662
2040	4.41186
2045	4.53626
2050	4.65374
2055	4.7069
2060	4.70139
2065	4.69744
2070	4.73517
2075	4.80031
2080	4.85275
2085	4.87086
2090	4.85003
2095	4.80447
2100	4.77175