Year	Percent
1950	11.27106
1955	11.19344
1960	11.13344
1965	11.53527
1970	11.77264
1975	12.03579
1980	12.32248
1985	12.65689
1990	12.87484
1995	12.49328
2000	11.89154
2005	11.495
2010	11.4351
2015	11.8977
2020	12.51088
2025	12.42269
2030	11.61586
2035	11.21201
2040	11.09433
2045	11.02154
2050	10.77653
2055	10.37754
2060	9.98869
2065	9.67679
2070	9.41122
2075	9.15994
2080	8.86241
2085	8.54727
2090	8.25497
2095	7.98708
2100	7.75536