Year	Percent
1950	6.4189
1955	6.87936
1960	7.73933
1965	7.76258
1970	7.04629
1975	5.88418
1980	5.65298
1985	5.76367
1990	6.10648
1995	6.69535
2000	6.5152
2005	6.01234
2010	5.68097
2015	5.54257
2020	5.78497
2025	5.71977
2030	5.60217
2035	5.50049
2040	5.40107
2045	5.3602
2050	5.39894
2055	5.4501
2060	5.44625
2065	5.40001
2070	5.33142
2075	5.26699
2080	5.22312
2085	5.1965
2090	5.15923
2095	5.10566
2100	5.02967