Year	Percent
1950	9.31511
1955	10.84512
1960	14.15921
1965	15.61799
1970	16.57715
1975	14.05138
1980	11.68465
1985	10.67668
1990	11.33923
1995	12.47263
2000	11.49773
2005	8.84328
2010	7.66487
2015	7.83342
2020	9.16521
2025	8.07959
2030	6.90152
2035	6.21751
2040	6.12918
2045	6.177
2050	6.06833
2055	5.82118
2060	5.57838
2065	5.42241
2070	5.39951
2075	5.42773
2080	5.42072
2085	5.35764
2090	5.2655
2095	5.18913
2100	5.15832