Year	Percent
1950	11.55229
1955	11.56812
1960	10.53324
1965	9.87564
1970	11.02095
1975	13.3147
1980	11.41318
1985	10.22049
1990	11.41511
1995	12.10418
2000	11.52243
2005	10.84972
2010	9.94639
2015	9.24043
2020	8.66278
2025	8.82309
2030	8.23222
2035	7.7566
2040	7.27581
2045	6.86268
2050	6.55642
2055	6.35817
2060	6.1901
2065	6.0229
2070	5.84211
2075	5.68949
2080	5.57245
2085	5.48667
2090	5.42477
2095	5.36323
2100	5.30307