Year	Percent
1950	6.73503
1955	9.7263
1960	9.12473
1965	8.732
1970	8.76871
1975	8.21176
1980	7.8938
1985	6.88115
1990	7.01575
1995	6.84578
2000	6.40694
2005	6.37446
2010	6.43268
2015	6.43171
2020	6.16096
2025	5.94098
2030	5.81304
2035	5.7832
2040	5.82234
2045	5.83157
2050	5.76949
2055	5.67593
2060	5.60821
2065	5.5855
2070	5.58589
2075	5.56723
2080	5.51768
2085	5.44627
2090	5.37605
2095	5.33249
2100	5.30194