Year	Percent
1950	7.34799
1955	8.65594
1960	9.09524
1965	7.80841
1970	7.47143
1975	7.76763
1980	7.61728
1985	7.11517
1990	6.14989
1995	5.21568
2000	5.67931
2005	6.42012
2010	6.1762
2015	5.80268
2020	5.81455
2025	5.09949
2030	5.23099
2035	5.51624
2040	5.65522
2045	5.59168
2050	5.43743
2055	5.28969
2060	5.25513
2065	5.33464
2070	5.40627
2075	5.38729
2080	5.28829
2085	5.17755
2090	5.11947
2095	5.1167
2100	5.13002