| | 1998 | | | Rank | Provinces | Student/Room | | 1 | Mae Hong Son | 17.73 | | 2 | Uthai Thani | 20.01 | | 3 | Phichit | 20.46 | | 4 | Nan | 20.80 | | 5 | Chai Nat | 20.92 | | 6 | Uttaradit | 21.18 | | 7 | Sing Buri | 21.26 | | 8 | Lamphun | 21.43 | | 9 | Loei | 21.45 | | 10 | Phrae | 22.18 | | | Whole Kingdom | 25.90 |
| | | 1999 | | | Rank | Provinces | Student/Room | | 1 | Mae Hong Son | 17.48 | | 2 | Uthai Thani | 20.10 | | 3 | Nan | 20.52 | | 4 | Phichit | 20.74 | | 5 | Uttaradit | 20.80 | | 6 | Sing Buri | 21.15 | | 7 | Chai Nat | 21.17 | | 8 | Lamphun | 21.21 | | 9 | Loei | 21.29 | | 10 | Phrae | 22.03 | | | Whole Kingdom | 25.89 |
| | | 2000 | | | Rank | Provinces | Student/Room | | 1 | Bangkok | 7.04 | | 2 | Mae Hong Son | 17.51 | | 3 | Uthai Thani | 20.12 | | 4 | Sing Buri | 20.83 | | 5 | Phichit | 20.92 | | 6 | Uttaradit | 21.04 | | 7 | Nan | 21.08 | | 8 | Loei | 21.21 | | 9 | Lamphun | 21.35 | | 10 | Chai Nat | 21.83 | | | Whole Kingdom | 12.86 |
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