Year	Percent
1950	12.94511
1955	13.51896
1960	12.99872
1965	11.79671
1970	12.07861
1975	12.34942
1980	12.33718
1985	12.09906
1990	12.29306
1995	12.39059
2000	12.01629
2005	12.20341
2010	12.72069
2015	13.08493
2020	13.26356
2025	13.23727
2030	13.17463
2035	13.12523
2040	13.01766
2045	12.83638
2050	12.58028
2055	12.26022
2060	11.88677
2065	11.48072
2070	11.05566
2075	10.61216
2080	10.14976
2085	9.73378
2090	9.29499
2095	8.89635
2100	8.51942