| | 2009 | Rank | Provinces | Proportion | 1 | Uthai Thani | 45.32 | 2 | Kalasin | 45.11 | 3 | Mukdahan | 44.77 | 4 | Surin | 43.24 | 5 | Si Sa Ket | 42.96 | 6 | Pattani | 41.96 | 7 | Narathiwat | 41.83 | 8 | Tak | 41.28 | 9 | Yala | 40.81 | 10 | Mae Hong Son | 31.65 | | Whole Kingdom | 56.81 |
| | | 2010 | Rank | Provinces | Proportion | 1 | Kalasin | 52.02 | 2 | Buri Ram | 51.92 | 3 | Tak | 51.66 | 4 | Chaiyaphum | 50.93 | 5 | Narathiwat | 50.57 | 6 | Yala | 48.97 | 7 | Surin | 48.60 | 8 | Si Sa Ket | 48.24 | 9 | Pattani | 47.16 | 10 | Mae Hong Son | 41.23 | | Whole Kingdom | 61.79 |
| | | 2011 | Rank | Provinces | Proportion | 1 | Chaiyaphum | 56.30 | 2 | Nan | 56.28 | 3 | Amnat Charoen | 56.27 | 4 | Surin | 56.08 | 5 | Mukdahan | 55.49 | 6 | Yala | 55.34 | 7 | Pattani | 53.95 | 8 | Si Sa Ket | 53.45 | 9 | Narathiwat | 49.65 | 10 | Mae Hong Son | 37.78 | | Whole Kingdom | 66.38 |
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