Year	Percent
1950	7.79385
1955	10.16354
1960	10.81896
1965	8.84971
1970	8.22791
1975	8.06303
1980	8.26156
1985	8.38205
1990	7.96666
1995	7.52245
2000	6.86239
2005	6.13311
2010	5.83585
2015	5.45896
2020	5.3442
2025	5.31585
2030	5.248
2035	5.13731
2040	5.03077
2045	4.95252
2050	4.89929
2055	4.8909
2060	4.8934
2065	4.87217
2070	4.83915
2075	4.80321
2080	4.78809
2085	4.79207
2090	4.79854
2095	4.78773
2100	4.76194