| Revenue | 31/3/2019 | 31/3/2018 | 31/3/2017 | 31/3/2016 |
| Total revenue | 34,74,21,000 | 30,77,29,000 | 29,14,08,000 | 26,49,42,000 |
| Cost of revenue | 21,85,76,000 | 20,87,94,000 | 19,41,75,000 | 17,83,10,000 |
| Gross profit | 12,88,45,000 | 9,89,35,000 | 9,72,33,000 | 8,66,32,000 |
| Operating expenses |
| Research development | - | - | - | - |
| Selling general and administrative | - | 56,57,000 | 59,35,000 | 55,16,000 |
| Non-recurring | - | - | - | - |
| Others | 6,54,76,000 | 4,46,95,000 | 4,65,01,000 | 3,72,23,000 |
| Total operating expenses | 29,53,44,000 | 27,10,29,000 | 25,90,71,000 | 22,88,24,000 |
| Operating income or loss | 5,20,77,000 | 3,67,00,000 | 3,23,37,000 | 3,61,18,000 |
| Income from continuing operations |
| Total other income/expenses net | 33,55,000 | 1,20,88,000 | 61,93,000 | 24,49,000 |
| Earnings before interest and taxes | 5,20,77,000 | 3,67,00,000 | 3,23,37,000 | 3,61,18,000 |
| Interest expense | -13,32,000 | -8,96,000 | -6,38,000 | -3,87,000 |
| Income before tax | 5,54,32,000 | 4,87,88,000 | 3,85,30,000 | 3,85,67,000 |
| Income tax expense | 1,25,44,000 | 1,09,26,000 | 1,00,21,000 | 83,01,000 |
| Minority interest | 47,77,000 | 50,91,000 | 46,41,000 | 19,27,000 |
| Net income from continuing ops | 4,28,88,000 | 3,78,62,000 | 2,85,09,000 | 3,02,66,000 |
| Non-recurring events |
| Discontinued operations | - | - | - | - |
| Extraordinary items | - | - | - | - |
| Effect of accounting changes | - | - | - | - |
| Other items | - | - | - | - |
| Net income |
| Net income | 4,29,76,000 | 3,79,98,000 | 2,81,29,000 | 2,99,29,000 |
| Preferred stock and other adjustments | - | - | - | - |
| Net income applicable to common shares | 4,29,76,000 | 3,79,98,000 | 2,81,29,000 | 2,99,29,000 |