Year	Percent
1950	9.90259
1955	9.80136
1960	9.6513
1965	11.14976
1970	10.87908
1975	11.12775
1980	11.78733
1985	9.93798
1990	10.75564
1995	12.25204
2000	11.08635
2005	10.32791
2010	10.10994
2015	10.04791
2020	10.24561
2025	10.4189
2030	10.43015
2035	10.38053
2040	10.12597
2045	9.73993
2050	9.34309
2055	9.00248
2060	8.65019
2065	8.31091
2070	7.98095
2075	7.654
2080	7.35431
2085	7.06218
2090	6.80551
2095	6.56345
2100	6.34177