Ten provinces with highest insured persens in social security article 33: 2009 - 2011   2009   Rank Provinces Number 1 Bangkok 3,025,960 2 Samut Prakan 648,535 3 Chon Buri 499,263 4 Pathum Thani 382,121 5 Phra Nakhon Si Ayutthaya 336,965 6 Samut Sakhon 314,737 7 Rayong 293,483 8 Nonthaburi 223,144 9 Nakhon Ratchasima 204,466 10 Nakhon Pathom 192,556   Whole Kingdom 8,680,359   2010   Rank Provinces Number 1 Bangkok 3,069,504 2 Samut Prakan 672,023 3 Chon Buri 536,358 4 Pathum Thani 398,354 5 Phra Nakhon Si Ayutthaya 364,667 6 Samut Sakhon 320,237 7 Rayong 305,317 8 Nonthaburi 230,108 9 Nakhon Ratchasima 212,487 10 Nakhon Pathom 193,501   Whole Kingdom 8,955,744   2011   Rank Provinces Number 1 Bangkok 3,109,745 2 Samut Prakan 664,851 3 Chon Buri 564,054 4 Pathum Thani 386,729 5 Phra Nakhon Si Ayutthaya 330,582 6 Samut Sakhon 324,110 7 Rayong 313,113 8 Nonthaburi 230,357 9 Nakhon Ratchasima 221,699 10 Nakhon Pathom 190,003   Whole Kingdom 9,054,535 Source : Social Security Office, Ministry of Labour Compiled by : Statistical Forecasting Bureau,  National Statistical Office