Year	Percent
1950	8.50622
1955	8.41332
1960	8.17894
1965	8.46053
1970	8.22213
1975	8.25235
1980	8.7598
1985	9.50526
1990	9.81423
1995	10.18462
2000	10.6308
2005	10.74489
2010	10.04491
2015	9.3268
2020	8.90666
2025	9.34696
2030	9.96729
2035	9.66026
2040	9.02911
2045	8.58102
2050	8.31592
2055	8.17846
2060	8.06426
2065	7.89225
2070	7.63513
2075	7.34359
2080	7.08611
2085	6.87968
2090	6.71217
2095	6.54126
2100	6.3697