| 年度 | 数值 | 单位 | 发布日期 |
| 1998 | 3050 | 千头 | 2026-9 |
| 1997 | 2950 | 千头 | 2026-9 |
| 1996 | 2900 | 千头 | 2026-9 |
| 1995 | 2687 | 千头 | 2026-9 |
| 1994 | 3249 | 千头 | 2026-9 |
| 1993 | 3640 | 千头 | 2026-9 |
| 1992 | 3699 | 千头 | 2026-9 |
| 1991 | 4265 | 千头 | 2026-9 |
| 1990 | 4493 | 千头 | 2026-9 |
| 1989 | 3355 | 千头 | 2026-9 |
| 1988 | 3511 | 千头 | 2026-9 |
| 1987 | 4047 | 千头 | 2026-9 |
| 1986 | 4322 | 千头 | 2026-9 |
| 1985 | 4280 | 千头 | 2026-9 |
| 1984 | 4360 | 千头 | 2026-9 |
| 1983 | 4315 | 千头 | 2026-9 |
| 1982 | 4543 | 千头 | 2026-9 |
| 1981 | 3813 | 千头 | 2026-9 |
| 1980 | 4624 | 千头 | 2026-9 |
| 1979 | 4613 | 千头 | 2026-9 |
| 1978 | 4379 | 千头 | 2026-9 |
| 1977 | 4399 | 千头 | 2026-9 |
| 1976 | 5076 | 千头 | 2026-9 |
| 1975 | 4724 | 千头 | 2026-9 |
| 1974 | 4601 | 千头 | 2026-9 |
| 1973 | 4033 | 千头 | 2026-9 |
| 1972 | 3964 | 千头 | 2026-9 |
| 1971 | 4468 | 千头 | 2026-9 |
| 1970 | 4552 | 千头 | 2026-9 |
| 1969 | 5199 | 千头 | 2026-9 |
| 1968 | 4835 | 千头 | 2026-9 |
| 1967 | 4506 | 千头 | 2026-9 |
| 1966 | 4336 | 千头 | 2026-9 |
| 1965 | 4395 | 千头 | 2026-9 |
| 1964 | 4688 | 千头 | 2026-9 |
| 1963 | 4677 | 千头 | 2026-9 |
| 1962 | 4484 | 千头 | 2026-9 |
| 1961 | 4239 | 千头 | 2026-9 |
| 1960 | 4374 | 千头 | 2026-9 |