Year | Min Rate | Max Rate |
1971 | 7.29 | 7.73 |
1972 | 7.23 | 7.46 |
1973 | 7.43 | 8.85 |
1974 | 8.40 | 10.03 |
1975 | 8.80 | 9.60 |
1976 | 8.70 | 9.10 |
1977 | 8.65 | 9.00 |
1978 | 8.98 | 10.38 |
1979 | 10.38 | 12.90 |
1980 | 12.18 | 16.35 |
1981 | 14.80 | 18.63 |
1982 | 13.57 | 17.66 |
1983 | 12.55 | 13.89 |
1984 | 13.14 | 14.68 |
1985 | 11.09 | 13.29 |
1986 | 9.29 | 10.99 |
1987 | 9.03 | 11.58 |
1988 | 9.84 | 10.77 |
1989 | 9.68 | 11.22 |
1990 | 9.56 | 10.67 |
1991 | 8.35 | 9.75 |
1992 | 7.84 | 9.03 |
1993 | 6.74 | 8.07 |
1994 | 6.97 | 9.25 |
1995 | 7.11 | 9.22 |
1996 | 6.94 | 8.42 |
Year | Min Rate | Max Rate |
1997 | 6.99 | 8.18 |
1998 | 6.49 | 7.22 |
1999 | 6.74 | 8.15 |
2000 | 7.13 | 8.64 |
2001 | 6.45 | 7.24 |
2002 | 5.93 | 7.18 |
2003 | 5.21 | 6.44 |
2004 | 5.38 | 6.34 |
2005 | 5.53 | 6.37 |
2006 | 6.10 | 6.80 |
2007 | 5.96 | 6.74 |
2008 | 5.10 | 6.63 |
2009 | 4.71 | 5.59 |
2010 | 4.17 | 5.21 |
2011 | 3.91 | 5.05 |
2012 | 3.31 | 4.08 |
2013 | 3.34 | 4.58 |
2014 | 3.80 | 4.53 |
2015 | 3.59 | 4.09 |
2016 | 3.41 | 4.32 |
2017 | 3.78 | 4.30 |
2018 | 3.95 | 4.94 |
2019 | 3.49 | 4.51 |
2020 | 2.66 | 3.72 |
2021 | 2.65 | 3.18 |
2022 | 3.22 | 7.08 |
2023 | 6.09 | 7.23 |