Year	Percent
1950	15.68495
1955	16.40404
1960	16.61057
1965	16.83259
1970	17.19333
1975	18.1503
1980	18.58874
1985	17.62071
1990	16.54975
1995	15.97653
2000	14.56812
2005	13.71984
2010	13.49384
2015	13.81227
2020	13.02515
2025	12.15619
2030	11.30288
2035	10.58959
2040	10.01818
2045	9.52513
2050	9.01173
2055	8.46391
2060	7.94075
2065	7.49172
2070	7.1198
2075	6.81105
2080	6.54124
2085	6.27798
2090	6.04114
2095	5.84298
2100	5.68178