| Date | Value |
|---|---|
| May 1, 2025 | 4.22% |
| Jan 1, 2025 | 4.26% |
| Jan 1, 2024 | 5.21% |
| Jan 1, 2023 | 4.80% |
| Jan 1, 2022 | 0.33% |
| Jan 1, 2021 | 0.09% |
| Jan 1, 2020 | 1.56% |
| Jan 1, 2019 | 2.51% |
| Jan 1, 2018 | 1.62% |
| Jan 1, 2017 | 0.62% |
| Jan 1, 2016 | 0.43% |
| Jan 1, 2015 | 0.08% |
| Jan 1, 2014 | 0.07% |
| Jan 1, 2013 | 0.11% |
| Jan 1, 2012 | 0.07% |
| Jan 1, 2011 | 0.18% |
| Jan 1, 2010 | 0.15% |
| Jan 1, 2009 | 0.30% |
| Jan 1, 2008 | 2.84% |
| Jan 1, 2007 | 5.15% |
| Jan 1, 2006 | 4.47% |
| Jan 1, 2005 | 2.68% |
| Jan 1, 2004 | 0.99% |
| Jan 1, 2003 | 1.22% |
| Jan 1, 2002 | 1.77% |
| Jan 1, 2001 | 5.15% |
| Jan 1, 2000 | 5.76% |
| Jan 1, 1999 | 4.49% |
| Jan 1, 1998 | 5.23% |
| Jan 1, 1997 | 5.31% |
| Jan 1, 1996 | 5.13% |
| Jan 1, 1995 | 6.51% |
| Jan 1, 1994 | 3.25% |
| Jan 1, 1993 | 3.24% |
| Jan 1, 1992 | 4.01% |
| Jan 1, 1991 | 6.58% |
| Jan 1, 1990 | 7.96% |