| 年度 | 数值 | 单位 | 发布日期 |
|---|
| 2007 | 16 | 千吨 | 2026-9 |
| 2006 | 16 | 千吨 | 2026-9 |
| 2005 | 15 | 千吨 | 2026-9 |
| 2004 | 12 | 千吨 | 2026-9 |
| 2003 | 9 | 千吨 | 2026-9 |
| 2002 | 8 | 千吨 | 2026-9 |
| 2001 | 7 | 千吨 | 2026-9 |
| 2000 | 7 | 千吨 | 2026-9 |
| 1999 | 8 | 千吨 | 2026-9 |
| 1998 | 11 | 千吨 | 2026-9 |
| 1997 | 13 | 千吨 | 2026-9 |
| 1996 | 13 | 千吨 | 2026-9 |
| 1995 | 19 | 千吨 | 2026-9 |
| 1994 | 17 | 千吨 | 2026-9 |
| 1993 | 18 | 千吨 | 2026-9 |
| 1992 | 34 | 千吨 | 2026-9 |
| 1991 | 31 | 千吨 | 2026-9 |
| 1990 | 44 | 千吨 | 2026-9 |
| 1989 | 46 | 千吨 | 2026-9 |
| 1988 | 40 | 千吨 | 2026-9 |
| 1987 | 47 | 千吨 | 2026-9 |
| 1986 | 47 | 千吨 | 2026-9 |
| 1985 | 48 | 千吨 | 2026-9 |
| 1984 | 50 | 千吨 | 2026-9 |
| 1983 | 45 | 千吨 | 2026-9 |
| 1982 | 38 | 千吨 | 2026-9 |
| 1981 | 37 | 千吨 | 2026-9 |
| 1980 | 34 | 千吨 | 2026-9 |
| 1979 | 41 | 千吨 | 2026-9 |
| 1978 | 44 | 千吨 | 2026-9 |
| 1977 | 45 | 千吨 | 2026-9 |
| 1976 | 40 | 千吨 | 2026-9 |
| 1975 | 34 | 千吨 | 2026-9 |
| 1974 | 36 | 千吨 | 2026-9 |
| 1973 | 34 | 千吨 | 2026-9 |
| 1972 | 33 | 千吨 | 2026-9 |
| 1971 | 29 | 千吨 | 2026-9 |
| 1970 | 31 | 千吨 | 2026-9 |
| 1969 | 31 | 千吨 | 2026-9 |
| 1968 | 31 | 千吨 | 2026-9 |
| 1967 | 30 | 千吨 | 2026-9 |
| 1966 | 28 | 千吨 | 2026-9 |
| 1965 | 22 | 千吨 | 2026-9 |
| 1964 | 19 | 千吨 | 2026-9 |