| Date | Value |
|---|---|
| Oct 31, 2025 | 3.71% |
| Jan 1, 2025 | 4.43% |
| Jan 1, 2024 | 3.98% |
| Jan 1, 2023 | 3.64% |
| Jan 1, 2022 | 1.54% |
| Jan 1, 2021 | 0.45% |
| Jan 1, 2020 | 1.56% |
| Jan 1, 2019 | 2.54% |
| Jan 1, 2018 | 2.38% |
| Jan 1, 2017 | 1.92% |
| Jan 1, 2016 | 1.52% |
| Jan 1, 2015 | 1.37% |
| Jan 1, 2014 | 1.65% |
| Jan 1, 2013 | 0.81% |
| Jan 1, 2012 | 0.83% |
| Jan 1, 2011 | 1.99% |
| Jan 1, 2010 | 2.48% |
| Jan 1, 2009 | 1.60% |
| Jan 1, 2008 | 2.98% |
| Jan 1, 2007 | 4.75% |
| Jan 1, 2006 | 4.35% |
| Jan 1, 2005 | 3.71% |
| Jan 1, 2004 | 3.12% |
| Jan 1, 2003 | 3.05% |
| Jan 1, 2002 | 4.34% |
| Jan 1, 2001 | 4.86% |
| Jan 1, 2000 | 6.58% |
| Jan 1, 1999 | 4.60% |
| Jan 1, 1998 | 5.42% |
| Jan 1, 1997 | 6.33% |
| Jan 1, 1996 | 5.36% |
| Jan 1, 1995 | 7.76% |
| Jan 1, 1994 | 5.09% |
| Jan 1, 1993 | 5.83% |
| Jan 1, 1992 | 6.24% |
| Jan 1, 1991 | 7.70% |
| Jan 1, 1990 | 8.12% |