| Revenue | 31/12/2018 | 31/12/2017 | 31/12/2016 | 31/12/2015 |
| Total revenue | 9,277,000 | 8,953,300 | 7,838,400 | 6,836,300 |
| Cost of revenue | 7,975,700 | 7,702,100 | 6,759,300 | 5,847,500 |
| Gross profit | 1,301,300 | 1,251,200 | 1,079,100 | 988,800 |
| Operating expenses |
| Research development | - | - | - | - |
| Selling general and administrative | 921,600 | 857,100 | 742,100 | 662,900 |
| Non-recurring | - | - | - | - |
| Others | -7,100 | -13,900 | -26,300 | -3,000 |
| Total operating expenses | 8,890,200 | 8,545,300 | 7,475,100 | 6,507,400 |
| Operating income or loss | 386,800 | 408,000 | 363,300 | 328,900 |
| Income from continuing operations |
| Total other income/expenses net | -254,700 | -39,000 | -95,500 | -66,300 |
| Earnings before interest and taxes | 386,800 | 408,000 | 363,300 | 328,900 |
| Interest expense | -40,900 | -71,200 | 21,300 | -16,200 |
| Income before tax | 132,100 | 369,000 | 267,800 | 262,600 |
| Income tax expense | 76,900 | 93,400 | 76,500 | 79,700 |
| Minority interest | 23,500 | 20,600 | 18,600 | 22,900 |
| Net income from continuing ops | 55,200 | 275,600 | 191,300 | 182,900 |
| Non-recurring events |
| Discontinued operations | - | - | - | - |
| Extraordinary items | - | - | - | - |
| Effect of accounting changes | - | - | - | - |
| Other items | - | - | - | - |
| Net income |
| Net income | 48,200 | 267,700 | 184,400 | 175,800 |
| Preferred stock and other adjustments | - | - | - | - |
| Net income applicable to common shares | 48,200 | 267,700 | 184,400 | 175,800 |