Year	Percent
1950	6.01681
1955	8.7194
1960	8.29238
1965	8.00973
1970	8.06751
1975	7.62215
1980	7.3263
1985	6.34608
1990	6.45443
1995	6.27799
2000	5.8772
2005	5.85144
2010	5.90879
2015	5.91957
2020	5.68242
2025	5.48636
2030	5.3696
2035	5.33685
2040	5.36837
2045	5.37976
2050	5.33267
2055	5.25715
2060	5.20564
2065	5.19502
2070	5.20426
2075	5.19262
2080	5.14938
2085	5.08473
2090	5.01936
2095	4.9778
2100	4.94912