| First Bid (VND) | First bid (FB) and Second high bid (SHB) | First bid (FB) and Second low bid (SLB) | Observations | ||||||
| yes―yes | yes―no | no―yes | no―no | ||||||
| Number | Percent% | Number | Percent% | Number | Percent% | Number | Percent% | ||
| 10 | 56 | 96.55 | 2 | 3.45 | 0 | 0.00 | 0 | 0.00 | 58 |
| 20 | 58 | 95.08 | 3 | 4.92 | 0 | 0.00 | 0 | 0.00 | 61 |
| 30 | 44 | 88.00 | 3 | 6.00 | 2 | 4.00 | 1 | 2.00 | 50 |
| 40 | 46 | 83.64 | 8 | 14.54 | 0 | 0.00 | 1 | 1.82 | 55 |
| 60 | 24 | 53.33 | 15 | 33.33 | 1 | 2.22 | 5 | 11.11 | 45 |
| 80 | 16 | 34.78 | 21 | 45.65 | 6 | 13.04 | 3 | 6.52 | 46 |
| 100 | 8 | 19.05 | 5 | 11.90 | 5 | 11.90 | 24 | 57.14 | 42 |
| 130 | 7 | 17.50 | 4 | 10.00 | 3 | 7.50 | 26 | 65.00 | 40 |
| 160 | 2 | 5.13 | 3 | 7.69 | 7 | 17.95 | 27 | 69.23 | 39 |
| Total | 261 | 59.86b | 64 | 14.68b | 24 | 5.50b | 87 | 19.95b | 436 |