
| 2024 | 0.13 | 0.18 | 17.2 | 71% |
| 2023 | 0.13 | 0.17 | 16.44 | 73.6% |
| 2022 | 0.12 | 0.17 | 16.46 | 70.3% |
| 2021 | 0.11 | 0.16 | 15.92 | 71.4% |
| 2020 | 0.11 | 0.16 | 16.22 | 69.8% |
| 2019 | 0.11 | 0.15 | 15.81 | 74.8% |
| 2018 | 0.11 | 0.14 | 14.91 | 77.3% |
| 2017 | 0.1 | 0.13 | 14.18 | 77.4% |
| 2016 | 0.09 | 0.13 | 14.31 | 69.8% |
| 2015 | 0.08 | 0.12 | 13.53 | 70.5% |
| 2014 | 0.08 | 0.12 | 14.18 | 62.9% |
| 2013 | 0.07 | 0.11 | 13.14 | 65.5% |
| 2012 | 0.07 | 0.1 | 12.74 | 66.5% |
| 2011 | 0.06 | 0.09 | 11.78 | 66.9% |
| 2010 | 0.06 | 0.09 | 12.12 | 67.3% |
| 2009 | 0.06 | 0.09 | 11.95 | 67.8% |
| 2008 | 0.06 | 0.1 | 13.67 | 59.8% |
| 2007 | 0.06 | 0.11 | 15.18 | 58.4% |
| 2006 | 0.06 | 0.12 | 17.64 | 49.3% |
| 2005 | 0.06 | 0.13 | 18.28 | 49.2% |
| 2004 | 0.06 | 0.13 | 18.44 | 47.9% |
| 2003 | 0.06 | 0.12 | 17.91 | 49.5% |
| 2002 | 0.05 | 0.11 | 17.34 | 47.6% |
| 2001 | 0.05 | 0.11 | 17.75 | 45.3% |
| 2000 | 0.05 | 0.11 | 17.12 | 47.1% |
| 1999 | 0.06 | 0.15 | 24.31 | 36.8% |
| 1998 | 0.05 | 0.13 | 21.17 | 39.4% |
| 1997 | 0.05 | 0.13 | 20.59 | 39% |
| 1996 | 0.05 | 0.13 | 21.16 | 41.2% |
| 1995 | 0.05 | 0.11 | 18.36 | 48.9% |
| 1994 | 0.06 | 0.14 | 23.85 | 44.8% |
| 1993 | 0.07 | 0.14 | 25.17 | 47.4% |
| 1992 | 0.07 | 0.17 | 30.67 | 39.8% |