Year	Percent
1950	9.98739
1955	10.71285
1960	6.17891
1965	6.7478
1970	9.51959
1975	11.15884
1980	11.2755
1985	9.96735
1990	9.53381
1995	9.70463
2000	10.55299
2005	11.59903
2010	11.07301
2015	8.74259
2020	7.3931
2025	8.73811
2030	10.39965
2035	9.44774
2040	8.39196
2045	7.66884
2050	7.53201
2055	7.6422
2060	7.62318
2065	7.3677
2070	6.95514
2075	6.57387
2080	6.34645
2085	6.24591
2090	6.16193
2095	6.02317
2100	5.83434