| 1 | ÷ | 1980 | = | 0.00050505050505051 |
| 2 | ÷ | 1980 | = | 0.001010101010101 |
| 3 | ÷ | 1980 | = | 0.0015151515151515 |
| 4 | ÷ | 1980 | = | 0.002020202020202 |
| 5 | ÷ | 1980 | = | 0.0025252525252525 |
| 6 | ÷ | 1980 | = | 0.003030303030303 |
| 7 | ÷ | 1980 | = | 0.0035353535353535 |
| 8 | ÷ | 1980 | = | 0.004040404040404 |
| 9 | ÷ | 1980 | = | 0.0045454545454545 |
| 10 | ÷ | 1980 | = | 0.0050505050505051 |
| 11 | ÷ | 1980 | = | 0.0055555555555556 |
| 12 | ÷ | 1980 | = | 0.0060606060606061 |
| 13 | ÷ | 1980 | = | 0.0065656565656566 |
| 14 | ÷ | 1980 | = | 0.0070707070707071 |
| 15 | ÷ | 1980 | = | 0.0075757575757576 |
| 16 | ÷ | 1980 | = | 0.0080808080808081 |
| 17 | ÷ | 1980 | = | 0.0085858585858586 |
| 18 | ÷ | 1980 | = | 0.0090909090909091 |
| 19 | ÷ | 1980 | = | 0.0095959595959596 |
| 20 | ÷ | 1980 | = | 0.01010101010101 |