Ten provinces with most arrested for the narcotics: 2004 - 2006
 2004 
RankProvincescase
1Bangkok22,771
2Chon Buri5,642
3Chiang Rai3,465
4Samut Prakan2,962
5Chiang Mai1,550
6Tak1,529
7Pathum Thani1,398
8Nonthaburi1,295
9Songkhla1,164
10Narathiwat1,157
  whole kingdom 73,862
 2005 
RankProvincescase
1Bangkok28,532
2Chon Buri7,626
3Samut Prakan4,988
4Chiang Rai4,829
5Chiang Mai2,419
6Nonthaburi2,012
7Pathum Thani1,959
8Nakhon Pathom1,844
9Phra Nakhon Si Ayutthaya1,742
10Kanchana Buri1,730
  whole kingdom 99,789
 2006 
RankProvincescase
1Bangkok29,700
2Chon Buri9,332
3Samut Prakan5,157
4Chiang Rai3,283
5Chiang Mai2,944
6Nakhon Pathom2,752
7Pathum Thani2,389
8Kanchana Buri2,209
9Nonthaburi2,057
10Ratcha Buri1,815
  whole kingdom 110,167
Souce : The Royal Thai Police
Compiled by : Statistical Forecasting Bureau,  National Statistical Office