Year	Percent
1950	10.07845
1955	9.90262
1960	9.36579
1965	8.77912
1970	9.97809
1975	10.60943
1980	10.62311
1985	10.37691
1990	10.25938
1995	10.54578
2000	11.17603
2005	11.29986
2010	10.86253
2015	10.47073
2020	10.30277
2025	10.36284
2030	10.41859
2035	10.09533
2040	9.71812
2045	9.38656
2050	9.14069
2055	8.94665
2060	8.74562
2065	8.51583
2070	8.24914
2075	8.00877
2080	7.7906
2085	7.61248
2090	7.41436
2095	7.20691
2100	7.0031