| 年度 | 数值 | 单位 | 发布日期 |
|---|---|---|---|
| 2005/2006 | 2.308 | 吨/公顷 | 2026-9 |
| 2004/2005 | 2.308 | 吨/公顷 | 2026-9 |
| 2003/2004 | 2.143 | 吨/公顷 | 2026-9 |
| 2002/2003 | 2 | 吨/公顷 | 2026-9 |
| 2001/2002 | 2.182 | 吨/公顷 | 2026-9 |
| 2000/2001 | 1.5 | 吨/公顷 | 2026-9 |
| 1999/2000 | 2.722 | 吨/公顷 | 2026-9 |
| 1998/1999 | 1.951 | 吨/公顷 | 2026-9 |
| 1997/1998 | 2.508 | 吨/公顷 | 2026-9 |
| 1996/1997 | 2.096 | 吨/公顷 | 2026-9 |
| 1995/1996 | 2.058 | 吨/公顷 | 2026-9 |
| 1994/1995 | 1.694 | 吨/公顷 | 2026-9 |
| 1993/1994 | 1.375 | 吨/公顷 | 2026-9 |
| 1992/1993 | 1.324 | 吨/公顷 | 2026-9 |
| 1991/1992 | 1.291 | 吨/公顷 | 2026-9 |
| 1990/1991 | 2.706 | 吨/公顷 | 2026-9 |