| Revenue | 12/31/2018 | 12/31/2017 | 12/31/2016 | 12/31/2015 |
| Total Revenue | 4,531,600 | 4,443,351 | 4,128,828 | 4,014,052 |
| Cost of Revenue | 3,741,000 | 3,640,480 | 3,349,253 | 3,324,475 |
| Gross Profit | 790,600 | 802,871 | 779,575 | 689,577 |
| Operating Expenses |
| Research Development | - | - | - | - |
| Selling General and Administrative | - | - | - | - |
| Non Recurring | - | - | - | - |
| Others | 168,600 | 166,673 | 151,826 | 140,955 |
| Total Operating Expenses | 4,129,900 | 4,014,639 | 3,717,397 | 3,677,177 |
| Operating Income or Loss | 401,700 | 428,712 | 411,431 | 336,875 |
| Income from Continuing Operations |
| Total Other Income/Expenses Net | -84,800 | -78,685 | -85,203 | -89,822 |
| Earnings Before Interest and Taxes | 401,700 | 428,712 | 411,431 | 336,875 |
| Interest Expense | -84,600 | -82,788 | -87,848 | -91,179 |
| Income Before Tax | 316,900 | 350,027 | 326,228 | 247,053 |
| Income Tax Expense | 47,500 | 65,041 | 93,132 | 70,664 |
| Minority Interest | - | - | - | 124,043 |
| Net Income From Continuing Ops | 269,400 | 284,986 | 233,096 | 176,389 |
| Non-recurring Events |
| Discontinued Operations | 2,900 | -3,783 | -168,663 | -798,824 |
| Extraordinary Items | - | - | - | - |
| Effect Of Accounting Changes | - | - | - | - |
| Other Items | - | - | - | - |
| Net Income |
| Net Income | 272,300 | 281,203 | 64,433 | -622,435 |
| Preferred Stock And Other Adjustments | - | - | - | - |
| Net Income Applicable To Common Shares | 272,300 | 280,432 | 63,748 | -623,120 |