Year	Percent
1950	6.75673
1955	6.22418
1960	7.07401
1965	7.55752
1970	7.64629
1975	7.05062
1980	5.98262
1985	5.58841
1990	5.73246
1995	6.111
2000	6.51085
2005	6.33909
2010	5.89243
2015	5.31107
2020	5.42716
2025	5.65744
2030	5.60083
2035	5.49922
2040	5.41732
2045	5.33702
2050	5.30873
2055	5.35411
2060	5.40927
2065	5.40656
2070	5.36111
2075	5.29554
2080	5.23532
2085	5.19241
2090	5.16633
2095	5.13104
2100	5.08014