
| 2024 | 0.0055 | 0.06 | 21.35 | 8.5% |
| 2023 | 0.0063 | 0.06 | 21.48 | 9.9% |
| 2022 | 0.0044 | 0.06 | 21.23 | 7.2% |
| 2021 | 0.005 | 0.07 | 23.2 | 7.7% |
| 2020 | 0.0066 | 0.07 | 23.85 | 10.1% |
| 2019 | 0.0046 | 0.07 | 26.21 | 6.6% |
| 2018 | 0.0048 | 0.07 | 27.62 | 6.7% |
| 2017 | 0.0058 | 0.07 | 28.19 | 8.2% |
| 2016 | 0.0048 | 0.07 | 28.7 | 6.9% |
| 2015 | 0.0053 | 0.07 | 29.07 | 7.6% |
| 2014 | 0.0052 | 0.07 | 28.29 | 7.9% |
| 2013 | 0.0044 | 0.06 | 27.62 | 7.1% |
| 2012 | 0.0055 | 0.06 | 26.88 | 9.4% |
| 2011 | 0.0048 | 0.06 | 26.69 | 8.4% |
| 2010 | 0.0043 | 0.06 | 26.28 | 7.7% |
| 2009 | 0.0048 | 0.05 | 25.24 | 9.2% |
| 2008 | 0.0048 | 0.05 | 24.69 | 9.5% |
| 2007 | 0.0053 | 0.05 | 23.32 | 11.2% |
| 2006 | 0.0052 | 0.04 | 22.59 | 11.5% |
| 2005 | 0.0057 | 0.05 | 22.91 | 12.6% |
| 2004 | 0.0047 | 0.04 | 21.48 | 11.2% |
| 2003 | 0.0049 | 0.04 | 20.51 | 12.3% |
| 2002 | 0.0049 | 0.04 | 19.62 | 13.1% |
| 2001 | 0.0041 | 0.04 | 22.02 | 10.1% |
| 2000 | 0.0048 | 0.03 | 18.96 | 13.8% |
| 1999 | 0.0039 | 0.04 | 20.65 | 10.8% |
| 1998 | 0.0034 | 0.03 | 15.36 | 12.6% |
| 1997 | 0.0021 | 0.03 | 15.5 | 7.9% |
| 1996 | 0.0029 | 0.03 | 15.49 | 11.3% |
| 1995 | 0.0038 | 0.02 | 15.34 | 15.6% |
| 1994 | 0 | 0.02 | 13.2 | 0% |
| 1993 | 0 | 0.02 | 14.28 | 0% |
| 1992 | 0 | 0.02 | 11.73 | 0% |
| 1991 | 0 | 0.02 | 13.01 | 0% |
| 1990 | 0 | 0.03 | 25.31 | 0% |