Year	Percent
1950	12.05643
1955	12.77806
1960	13.32409
1965	12.20939
1970	12.40425
1975	12.65121
1980	12.8404
1985	12.94993
1990	12.80292
1995	12.39443
2000	13.32228
2005	13.45426
2010	13.32034
2015	13.14178
2020	13.34779
2025	12.42653
2030	12.13823
2035	11.77381
2040	11.34075
2045	10.83629
2050	10.36035
2055	9.92344
2060	9.50789
2065	9.13111
2070	8.76883
2075	8.42144
2080	8.08096
2085	7.75538
2090	7.45115
2095	7.16601
2100	6.88997