| 年度 | 数值 | 单位 | 发布日期 |
|---|
| 2026 | 20 | 千吨 | 2026-9 |
| 2025 | 25 | 千吨 | 2026-9 |
| 2024 | 25 | 千吨 | 2026-9 |
| 2023 | 28 | 千吨 | 2026-9 |
| 2022 | 21 | 千吨 | 2026-9 |
| 2021 | 36 | 千吨 | 2026-9 |
| 2020 | 32 | 千吨 | 2026-9 |
| 2019 | 48 | 千吨 | 2026-9 |
| 2018 | 51 | 千吨 | 2026-9 |
| 2017 | 50 | 千吨 | 2026-9 |
| 2016 | 40 | 千吨 | 2026-9 |
| 2015 | 36 | 千吨 | 2026-9 |
| 2014 | 24 | 千吨 | 2026-9 |
| 2013 | 25 | 千吨 | 2026-9 |
| 2012 | 17 | 千吨 | 2026-9 |
| 2011 | 13 | 千吨 | 2026-9 |
| 2010 | 14 | 千吨 | 2026-9 |
| 2009 | 19 | 千吨 | 2026-9 |
| 2008 | 17 | 千吨 | 2026-9 |
| 2007 | 36 | 千吨 | 2026-9 |
| 2006 | 16 | 千吨 | 2026-9 |
| 2005 | 62 | 千吨 | 2026-9 |
| 2004 | 111 | 千吨 | 2026-9 |
| 2003 | 207 | 千吨 | 2026-9 |
| 2002 | 185 | 千吨 | 2026-9 |
| 2001 | 98 | 千吨 | 2026-9 |
| 2000 | 157 | 千吨 | 2026-9 |
| 1999 | 151 | 千吨 | 2026-9 |
| 1998 | 124 | 千吨 | 2026-9 |
| 1997 | 229 | 千吨 | 2026-9 |
| 1996 | 181 | 千吨 | 2026-9 |
| 1995 | 148 | 千吨 | 2026-9 |
| 1994 | 153 | 千吨 | 2026-9 |
| 1993 | 92 | 千吨 | 2026-9 |
| 1992 | 185 | 千吨 | 2026-9 |
| 1991 | 212 | 千吨 | 2026-9 |
| 1990 | 475 | 千吨 | 2026-9 |
| 1989 | 509 | 千吨 | 2026-9 |
| 1988 | 543 | 千吨 | 2026-9 |