Year	Percent
1950	6.20635
1955	7.71385
1960	8.05182
1965	6.76598
1970	6.4081
1975	6.65993
1980	6.77961
1985	6.42138
1990	5.58779
1995	5.44622
2000	6.23465
2005	6.49511
2010	5.02539
2015	5.17737
2020	5.64146
2025	5.58481
2030	5.72706
2035	5.71223
2040	5.47898
2045	5.27236
2050	5.2838
2055	5.39145
2060	5.46369
2065	5.45775
2070	5.37173
2075	5.26025
2080	5.20135
2085	5.20848
2090	5.23007
2095	5.21178
2100	5.1475