Year	Percent
1950	9.33616
1955	9.15398
1960	9.84677
1965	9.68846
1970	10.73108
1975	10.54476
1980	10.39833
1985	10.35465
1990	10.44781
1995	10.71743
2000	10.65245
2005	10.31879
2010	10.10032
2015	9.95429
2020	9.53283
2025	9.01288
2030	8.4956
2035	8.25704
2040	7.97945
2045	7.6708
2050	7.33945
2055	7.02171
2060	6.72856
2065	6.47395
2070	6.24549
2075	6.041
2080	5.85101
2085	5.68395
2090	5.5362
2095	5.41529
2100	5.3106