Year	Percent
1950	11.18302
1955	10.96653
1960	10.96645
1965	11.11034
1970	11.12616
1975	11.5244
1980	11.86124
1985	12.08847
1990	12.38291
1995	12.95884
2000	13.10642
2005	12.65697
2010	12.16822
2015	12.30775
2020	12.46122
2025	12.26263
2030	11.79198
2035	11.34754
2040	10.94567
2045	10.61211
2050	10.26812
2055	9.93359
2060	9.58398
2065	9.22939
2070	8.88565
2075	8.58058
2080	8.30715
2085	8.02911
2090	7.75668
2095	7.49184
2100	7.23939