| 従業員数 | 前年比（％） | |
|---|---|---|
| 4Q26 | 21,170 | +0.7% |
| 4Q25 | 21,029 | +6.1% |
| 4Q24 | 19,813 | +2.1% |
| 4Q23 | 19,396 | +0.5% |
| 4Q22 | 19,295 | +2.1% |
| 4Q21 | 18,905 | +1.2% |
| 4Q20 | 18,673 | +2.1% |
| 4Q19 | 18,297 | +3.2% |
| 4Q18 | 17,730 | +8.0% |
| 4Q17 | 16,422 | +3.9% |
| 4Q16 | 15,810 | +2.8% |
| 4Q15 | 15,383 | -0.1% |
| 4Q14 | 15,391 | -0.5% |
| 4Q13 | 15,468 | +2.1% |
| 4Q12 | 15,149 | +0.4% |
| 4Q11 | 15,083 | -0.7% |
| 4Q10 | 15,189 | - |