| 年度 | 数值 | 单位 | 发布日期 |
| 1998 | 4910 | 千头 | 2026-9 |
| 1997 | 5790 | 千头 | 2026-9 |
| 1996 | 5931 | 千头 | 2026-9 |
| 1995 | 5012 | 千头 | 2026-9 |
| 1994 | 6123 | 千头 | 2026-9 |
| 1993 | 6715 | 千头 | 2026-9 |
| 1992 | 7399 | 千头 | 2026-9 |
| 1991 | 10787 | 千头 | 2026-9 |
| 1990 | 10207 | 千头 | 2026-9 |
| 1989 | 11546 | 千头 | 2026-9 |
| 1988 | 10549 | 千头 | 2026-9 |
| 1987 | 11381 | 千头 | 2026-9 |
| 1986 | 10295 | 千头 | 2026-9 |
| 1985 | 10568 | 千头 | 2026-9 |
| 1984 | 12664 | 千头 | 2026-9 |
| 1983 | 11334 | 千头 | 2026-9 |
| 1982 | 10029 | 千头 | 2026-9 |
| 1981 | 9889 | 千头 | 2026-9 |
| 1980 | 9921 | 千头 | 2026-9 |
| 1979 | 9690 | 千头 | 2026-9 |
| 1978 | 9134 | 千头 | 2026-9 |
| 1977 | 9056 | 千头 | 2026-9 |
| 1976 | 8339 | 千头 | 2026-9 |
| 1975 | 9025 | 千头 | 2026-9 |
| 1974 | 8769 | 千头 | 2026-9 |
| 1973 | 7384 | 千头 | 2026-9 |
| 1972 | 8014 | 千头 | 2026-9 |
| 1971 | 6247 | 千头 | 2026-9 |
| 1970 | 5617 | 千头 | 2026-9 |
| 1969 | 5041 | 千头 | 2026-9 |
| 1968 | 6512 | 千头 | 2026-9 |
| 1967 | 0 | 千头 | 2026-9 |
| 1966 | 0 | 千头 | 2026-9 |
| 1965 | 0 | 千头 | 2026-9 |
| 1964 | 0 | 千头 | 2026-9 |
| 1963 | 0 | 千头 | 2026-9 |
| 1962 | 0 | 千头 | 2026-9 |
| 1961 | 0 | 千头 | 2026-9 |
| 1960 | 0 | 千头 | 2026-9 |