Year	Percent
1950	14.14633
1955	15.40641
1960	15.16098
1965	14.62556
1970	13.82144
1975	12.1913
1980	11.03956
1985	10.8164
1990	10.78792
1995	9.78531
2000	8.64313
2005	7.76297
2010	7.3058
2015	6.73861
2020	6.3785
2025	6.04956
2030	5.7327
2035	5.43655
2040	5.20071
2045	5.03821
2050	4.91125
2055	4.81813
2060	4.73464
2065	4.66252
2070	4.59712
2075	4.56318
2080	4.5435
2085	4.53668
2090	4.53439
2095	4.51913
2100	4.50774