| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2026 | 17.57 | 18.29 | 16.12 |
| 2025 | 17.51 | 19.98 | 14.16 |
| 2024 | 14.55 | 17.82 | 11.81 |
| 2023 | 7.23 | 21.39 | 2.38 |
| 2022 | 22.17 | 26.27 | 18.81 |
| 2021 | 19.34 | 26.62 | 14.5 |
| 2020 | 25 | 31.23 | 14.94 |
| 2019 | 30.93 | 44.72 | 22.94 |
| 2018 | 48.14 | 71.32 | 33.98 |
| 2017 | 71.2 | 78.51 | 66.52 |
| 2016 | 64.44 | 76.13 | 48.33 |
| 2015 | 78.82 | 113.2 | 51.57 |
| 2014 | 77.46 | 92.68 | 70.39 |
| 2013 | 0 | -9.01 | |
| 2012 | 327.77 | 420.69 | 258.5 |
| 2011 | 0 | -15.39 | |
| 2010 | 26.89 | 45.66 | 12 |
| 2009 | 10.39 | 15.39 | 6.68 |
| 2008 | 15.32 | 38.6 | 6.09 |
| 2007 | 28.65 | 45.36 | 20.57 |
| 2006 | 17.53 | 22.14 | 10 |
| 2005 | 2.22 | 12.15 | 0.27 |
| 2004 | 0.57 | 1 | 0.24 |
| 2003 | 0.72 | 0.88 | 0.66 |
| 2002 | 0.54 | 0.66 | 0.49 |
| 2001 | 0.79 | 1.35 | 0.48 |
| 2000 | 0.43 | 0.68 | 0.3 |
| 1999 | 0.44 | 0.72 | 0.25 |
| 1998 | 0.4 | 0.63 | 0.17 |