| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 24.17 | 27.84 | 21.3 |
| 2024 | 21.06 | 31.61 | 13.8 |
| 2023 | 21.71 | 24.82 | 18.43 |
| 2022 | 23.54 | 30.8 | 19.58 |
| 2021 | 27.61 | 39.88 | 17.72 |
| 2020 | 24.23 | 28.46 | 21.3 |
| 2019 | 26.41 | 32.26 | 22.75 |
| 2018 | 30.58 | 44.24 | 20.05 |
| 2017 | 0 | -68.08 | |
| 2016 | 1003.27 | 1159.37 | 879.27 |
| 2015 | 0 | -63.29 | |
| 2014 | 2219.4 | 2447.17 | 1870.25 |
| 2013 | 434.98 | 470.32 | 395.86 |
| 2012 | 0 | -16.67 | |
| 2011 | 0 | -8.58 | |
| 2010 | 0 | -7.88 | |
| 2009 | 97.8 | 201.9 | 9.18 |
| 2008 | 10.62 | 16.58 | 6.51 |
| 2007 | 9.04 | 16.92 | 2.97 |
| 2006 | 2.27 | 3.54 | 1.13 |
| 2005 | 1.68 | 2.49 | 1.15 |
| 2004 | 3.98 | 8.85 | 1.84 |
| 2003 | 7.02 | 9.08 | 5.24 |
| 2002 | 6.16 | 7.03 | 4.88 |
| 2001 | 7.74 | 8.97 | 6.3 |
| 2000 | 8.58 | 11.38 | 4.11 |
| 1999 | 4.11 | 5.75 | 3.06 |
| 1998 | 3.99 | 4.99 | 3.17 |
| 1997 | 3.51 | 5.19 | 2.24 |