| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 14.06 | 14.53 | 13.57 |
| 2024 | 12.07 | 14.66 | 10.48 |
| 2023 | 23.95 | 35.75 | 11.86 |
| 2022 | 123.45 | 135.85 | 77.43 |
| 2021 | 87.28 | 127.17 | 42.47 |
| 2020 | 18.96 | 49.14 | 7.33 |
| 2019 | 10.56 | 13.25 | 8.49 |
| 2018 | 14.14 | 18.07 | 11.99 |
| 2017 | 21.69 | 24.65 | 17.85 |
| 2016 | 20.96 | 23.55 | 19.13 |
| 2015 | 24.6 | 32.9 | 18.86 |
| 2014 | 23.66 | 28.03 | 20.91 |
| 2013 | 19.32 | 27.56 | 14.09 |
| 2012 | 13.6 | 15.86 | 11.78 |
| 2011 | 18.44 | 25.99 | 11.59 |
| 2010 | 26.06 | 31.73 | 22.28 |
| 2009 | 19.18 | 22.95 | 16.04 |
| 2008 | 30.13 | 60.09 | 11.33 |
| 2007 | 47.71 | 64.68 | 32.63 |
| 2006 | 39.25 | 72.72 | 23.14 |
| 2005 | 12.99 | 44.29 | 1.39 |
| 2004 | 2.62 | 4.13 | 1.26 |
| 2003 | 2.61 | 2.77 | 2.25 |
| 2002 | 2.09 | 2.46 | 1.47 |
| 2001 | 1.98 | 2.86 | 1.16 |
| 2000 | 0.62 | 0.92 | 0.35 |
| 1999 | 0.39 | 0.69 | 0.21 |
| 1998 | 0.46 | 0.89 | 0.23 |
| 1997 | 0.86 | 1.3 | 0.5 |