Ten provinces with highest insured persens in social security article 39: 2009 - 2011   2009   Rank Provinces Number 1 Bangkok 186,591 2 Samut Prakan 51,067 3 Chiang Mai 37,278 4 Pathum Thani 31,991 5 Nonthaburi 28,696 6 Chon Buri 27,587 7 Nakhon Ratchasima 17,270 8 Songkhla 16,056 9 Samut Sakhon 14,539 10 Phra Nakhon Si Ayutthaya 13,001   Whole Kingdom 679,700   2010   Rank Provinces Number 1 Bangkok 207,469 2 Samut Prakan 54,848 3 Chiang Mai 41,434 4 Pathum Thani 36,439 5 Nonthaburi 31,643 6 Chon Buri 30,431 7 Nakhon Ratchasima 18,679 8 Songkhla 18,141 9 Samut Sakhon 16,574 10 Nakhon Pathom 13,838   Whole Kingdom 747,005   2011   Rank Provinces Number 1 Bangkok 230,843 2 Samut Prakan 60,781 3 Chiang Mai 47,334 4 Pathum Thani 40,733 5 Chon Buri 34,872 6 Nonthaburi 34,841 7 Nakhon Ratchasima 21,595 8 Songkhla 21,051 9 Samut Sakhon 19,144 10 Nakhon Pathom 15,479   Whole Kingdom 855,412 Source : Social Security Office, Ministry of Labour Compiled by : Statistical Forecasting Bureau,  National Statistical Office