Year	Percent
1950	6.61552
1955	7.74966
1960	9.13402
1965	8.3562
1970	8.18311
1975	8.06197
1980	8.44391
1985	7.81186
1990	6.4849
1995	6.1966
2000	6.63958
2005	7.01061
2010	6.63447
2015	5.97666
2020	5.97857
2025	5.59268
2030	5.68105
2035	5.67173
2040	5.59608
2045	5.49242
2050	5.3967
2055	5.33701
2060	5.3242
2065	5.32763
2070	5.30494
2075	5.2507
2080	5.18758
2085	5.13788
2090	5.10883
2095	5.08362
2100	5.05969