| Revenue | 12/31/2018 | 12/31/2017 | 12/31/2016 | 12/31/2015 |
| Total Revenue | 3,769,600 | 3,458,000 | 3,150,100 | 2,690,600 |
| Cost of Revenue | 2,142,700 | 1,987,200 | 1,827,400 | 1,548,500 |
| Gross Profit | 1,626,900 | 1,470,800 | 1,322,700 | 1,142,100 |
| Operating Expenses |
| Research Development | - | - | - | - |
| Selling General and Administrative | 724,700 | 640,200 | 583,100 | 502,000 |
| Non Recurring | - | - | - | - |
| Others | - | - | - | - |
| Total Operating Expenses | 3,137,300 | 2,892,000 | 2,651,100 | 2,263,300 |
| Operating Income or Loss | 632,300 | 566,000 | 499,000 | 427,300 |
| Income from Continuing Operations |
| Total Other Income/Expenses Net | -196,600 | -168,000 | -143,700 | -86,800 |
| Earnings Before Interest and Taxes | 632,300 | 566,000 | 499,000 | 427,300 |
| Interest Expense | -192,000 | -164,000 | -138,800 | -91,400 |
| Income Before Tax | 435,700 | 398,000 | 355,300 | 340,500 |
| Income Tax Expense | 107,700 | 36,000 | 132,900 | 125,900 |
| Minority Interest | - | - | - | - |
| Net Income From Continuing Ops | 328,000 | 362,000 | 222,400 | 214,600 |
| Non-recurring Events |
| Discontinued Operations | - | - | - | - |
| Extraordinary Items | - | - | - | - |
| Effect Of Accounting Changes | - | - | - | - |
| Other Items | - | - | - | - |
| Net Income |
| Net Income | 328,000 | 362,000 | 222,400 | 214,600 |
| Preferred Stock And Other Adjustments | - | - | - | - |
| Net Income Applicable To Common Shares | 328,000 | 362,000 | 222,400 | 214,600 |