Year	Percent
1950	10.1775
1955	8.88793
1960	6.9022
1965	9.51821
1970	11.04857
1975	10.84928
1980	8.17492
1985	7.1424
1990	7.84789
1995	8.73991
2000	9.17251
2005	8.0357
2010	6.95438
2015	5.61534
2020	4.99842
2025	5.67393
2030	5.49816
2035	5.08946
2040	4.70524
2045	4.46886
2050	4.36438
2055	4.49033
2060	4.6686
2065	4.70981
2070	4.6294
2075	4.56617
2080	4.58123
2085	4.69371
2090	4.83875
2095	4.92009
2100	4.91087