Year	Percent
1950	7.54295
1955	6.51036
1960	5.98263
1965	8.60105
1970	8.14379
1975	7.95284
1980	7.94935
1985	7.69411
1990	7.3949
1995	6.42189
2000	6.56054
2005	6.32475
2010	5.9352
2015	5.89681
2020	6.00297
2025	5.99873
2030	5.77612
2035	5.5904
2040	5.49473
2045	5.49702
2050	5.56304
2055	5.59092
2060	5.54282
2065	5.45618
2070	5.38783
2075	5.36149
2080	5.36015
2085	5.34491
2090	5.30171
2095	5.23836
2100	5.17824