| 年度 | 数值 | 单位 | 发布日期 |
| 1998 | 7271 | 千头 | 2026-9 |
| 1997 | 7373 | 千头 | 2026-9 |
| 1996 | 7600 | 千头 | 2026-9 |
| 1995 | 7300 | 千头 | 2026-9 |
| 1994 | 8700 | 千头 | 2026-9 |
| 1993 | 7871 | 千头 | 2026-9 |
| 1992 | 9500 | 千头 | 2026-9 |
| 1991 | 11560 | 千头 | 2026-9 |
| 1990 | 12500 | 千头 | 2026-9 |
| 1989 | 11000 | 千头 | 2026-9 |
| 1988 | 15495 | 千头 | 2026-9 |
| 1987 | 15500 | 千头 | 2026-9 |
| 1986 | 15000 | 千头 | 2026-9 |
| 1985 | 15492 | 千头 | 2026-9 |
| 1984 | 13380 | 千头 | 2026-9 |
| 1983 | 16463 | 千头 | 2026-9 |
| 1982 | 12710 | 千头 | 2026-9 |
| 1981 | 13436 | 千头 | 2026-9 |
| 1980 | 13050 | 千头 | 2026-9 |
| 1979 | 13502 | 千头 | 2026-9 |
| 1978 | 13435 | 千头 | 2026-9 |
| 1977 | 10737 | 千头 | 2026-9 |
| 1976 | 10613 | 千头 | 2026-9 |
| 1975 | 9544 | 千头 | 2026-9 |
| 1974 | 9148 | 千头 | 2026-9 |
| 1973 | 8812 | 千头 | 2026-9 |
| 1972 | 8490 | 千头 | 2026-9 |
| 1971 | 7540 | 千头 | 2026-9 |
| 1970 | 7145 | 千头 | 2026-9 |
| 1969 | 6990 | 千头 | 2026-9 |
| 1968 | 0 | 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 |