Year	Percent
1950	9.61358
1955	14.87914
1960	17.56861
1965	17.62052
1970	15.23968
1975	14.56023
1980	13.86979
1985	14.68219
1990	14.88308
1995	13.40368
2000	11.34438
2005	9.80849
2010	11.52806
2015	13.18685
2020	11.65612
2025	10.19707
2030	9.23768
2035	8.97124
2040	8.95287
2045	8.76932
2050	8.33699
2055	7.76479
2060	7.25949
2065	6.94149
2070	6.77103
2075	6.62046
2080	6.40429
2085	6.1276
2090	5.86205
2095	5.66381
2100	5.54281