Year	Percent
1950	8.96057
1955	7.94843
1960	7.8962
1965	8.40659
1970	8.03309
1975	7.34885
1980	5.98714
1985	5.04915
1990	4.66902
1995	4.49768
2000	4.34039
2005	4.43927
2010	4.42578
2015	4.05408
2020	3.88783
2025	3.82184
2030	3.86919
2035	3.96899
2040	4.05346
2045	4.07763
2050	4.05938
2055	4.06425
2060	4.1324
2065	4.245
2070	4.3492
2075	4.40778
2080	4.41014
2085	4.37673
2090	4.34984
2095	4.34215
2100	4.35148