Year	Percent
1950	7.203
1955	8.08824
1960	9.6622
1965	9.53319
1970	9.85287
1975	9.54828
1980	8.90698
1985	8.73266
1990	7.49624
1995	7.39902
2000	7.25296
2005	7.23541
2010	6.51391
2015	6.13824
2020	6.51182
2025	6.51356
2030	6.58014
2035	6.32136
2040	6.06378
2045	5.88104
2050	5.85356
2055	5.8973
2060	5.91061
2065	5.83587
2070	5.71228
2075	5.59343
2080	5.51602
2085	5.48323
2090	5.45142
2095	5.3982
2100	5.31553