TABLE :2006   < 10%   Rank Provinces Establishments 1 Phrae 4 2 Samut Prakan 4 3 Saraburi 4 4 Nonthaburi 3 5 Phra Nakhon Si Ayutthaya 3 6 Chachoengsao 2 7 Chiang Mai 2 8 Chon Buri 2 9 Nakhon Pathom 2 10 Samut Sakhon 2 11 Songkhla 2   Whole Kingdom 37   10 - 50%   Rank Provinces Establishments 1 Chon Buri 67 2 Samut Prakan 67 3 Rayong 48 4 Phra Nakhon Si Ayutthaya 34 5 Chachoengsao 33 6 Prachin Buri 33 7 Samut Sakhon 26 8 Phuket 25 9 Chiang Mai 24 10 Saraburi 22   Whole Kingdom 573   > 50%   Rank Provinces Establishments 1 Phra Nakhon Si Ayutthaya 271 2 Chon Buri 250 3 Lamphun 52 4 Chachoengsao 45 5 Prachin Buri 31 6 Songkhla 30 7 Rayong 22 8 Samut Sakhon 22 9 Nakhon Pathom 17 10 Nakhon Ratchasima 16   Whole Kingdom 844 Source :The 2007 Industrial Census (Basic Information : Non-municipal area), Whole Kingdom     National Statistical Office, Ministry of Information and Communication Technology