Year	Percent
1950	8.3421
1955	8.25348
1960	8.0289
1965	8.20828
1970	7.92926
1975	7.99011
1980	8.52064
1985	9.27182
1990	9.60196
1995	9.98695
2000	10.44576
2005	10.64737
2010	10.1509
2015	9.46339
2020	9.0634
2025	9.49464
2030	10.09615
2035	9.75359
2040	9.08389
2045	8.60284
2050	8.31025
2055	8.14766
2060	8.00571
2065	7.80923
2070	7.53288
2075	7.22839
2080	6.96357
2085	6.7544
2090	6.58433
2095	6.41158
2100	6.23907