| Date | Value Value |
|---|---|
| May 31, 2023 | 3.85% |
| Jan 1, 2023 | 3.66% |
| Jan 1, 2022 | 2.10% |
| Jan 1, 2021 | 1.82% |
| Jan 1, 2020 | 2.22% |
| Jan 1, 2019 | 3.04% |
| Jan 1, 2018 | 2.88% |
| Jan 1, 2017 | 3.02% |
| Jan 1, 2016 | 2.86% |
| Jan 1, 2015 | 2.45% |
| Jan 1, 2014 | 3.77% |
| Jan 1, 2013 | 3.08% |
| Jan 1, 2012 | 3.03% |
| Jan 1, 2011 | 4.52% |
| Jan 1, 2010 | 4.60% |
| Jan 1, 2009 | 3.13% |
| Jan 1, 2008 | 4.33% |
| Jan 1, 2007 | 4.85% |
| Jan 1, 2002 | 5.45% |
| Jan 1, 2001 | 5.54% |
| Jan 1, 2000 | 6.63% |
| Jan 1, 1999 | 5.16% |
| Jan 1, 1998 | 5.81% |
| Jan 1, 1997 | 6.83% |
| Jan 1, 1996 | 6.05% |
| Jan 1, 1995 | 7.85% |
| Jan 1, 1994 | 6.29% |
| Jan 1, 1993 | 7.34% |
| Jan 1, 1992 | 7.58% |
| Jan 1, 1991 | 8.27% |
| Jan 1, 1990 | 8.26% |