| Revenue | 31/12/2018 | 31/12/2017 | 31/12/2016 | 31/12/2015 |
| Total revenue | 604,216 | 617,542 | 614,491 | 607,962 |
| Cost of revenue | 263,128 | 258,641 | 259,068 | 258,507 |
| Gross profit | 341,088 | 358,901 | 355,423 | 349,455 |
| Operating expenses |
| Research development | 3,825 | 3,586 | 3,952 | 4,205 |
| Selling general and administrative | 234,204 | 229,834 | 221,989 | 214,432 |
| Non-recurring | - | - | - | - |
| Others | -5,345 | -4,529 | -4,437 | -4,360 |
| Total operating expenses | 495,812 | 487,532 | 480,572 | 472,784 |
| Operating income or loss | 108,404 | 130,010 | 133,919 | 135,178 |
| Income from continuing operations |
| Total other income/expenses net | -4,411 | -6,879 | -7,016 | -11,727 |
| Earnings before interest and taxes | 108,404 | 130,010 | 133,919 | 135,178 |
| Interest expense | -207 | -724 | -1,128 | -1,199 |
| Income before tax | 103,993 | 123,131 | 126,903 | 123,451 |
| Income tax expense | 46,539 | 44,928 | 49,188 | 49,537 |
| Minority interest | 39 | 29 | 76 | 97 |
| Net income from continuing ops | 57,454 | 78,203 | 77,715 | 73,914 |
| Non-recurring events |
| Discontinued operations | - | - | - | - |
| Extraordinary items | - | - | - | - |
| Effect of accounting changes | - | - | - | - |
| Other items | - | - | - | - |
| Net income |
| Net income | 57,459 | 78,243 | 77,725 | 73,932 |
| Preferred stock and other adjustments | - | - | - | - |
| Net income applicable to common shares | 57,459 | 78,243 | 77,725 | 73,932 |