Year	Percent
1950	11.46668
1955	11.76192
1960	12.61828
1965	11.6098
1970	12.83506
1975	13.39411
1980	12.02456
1985	10.15176
1990	10.43104
1995	10.75765
2000	10.52039
2005	9.80418
2010	8.88366
2015	7.68978
2020	7.32848
2025	6.84109
2030	6.44651
2035	6.02654
2040	5.68023
2045	5.4017
2050	5.18922
2055	5.05538
2060	4.94696
2065	4.8523
2070	4.76208
2075	4.70828
2080	4.6824
2085	4.68081
2090	4.68955
2095	4.68899
2100	4.68122