Ten provinces with highest number of utiligation in case of sickness: 2009 - 2011   2009   Rank Provinces Number 1 Bangkok 7,983,715 2 Samut Prakan 2,781,469 3 Chon Buri 1,951,176 4 Samut Sakhon 1,768,141 5 Pathum Thani 1,520,946 6 Chiang Mai 990,176 7 Nakhon Ratchasima 901,234 8 Nonthaburi 890,980 9 Phra Nakhon Si Ayutthaya 833,425 10 Songkhla 624,078   Whole Kingdom 28,984,350   2010   Rank Provinces Number 1 Bangkok 8,117,066 2 Samut Prakan 2,881,940 3 Chon Buri 2,068,886 4 Samut Sakhon 1,800,730 5 Pathum Thani 1,620,647 6 Chiang Mai 983,300 7 Phra Nakhon Si Ayutthaya 902,974 8 Nonthaburi 894,070 9 Nakhon Ratchasima 769,199 10 Sara Buri 615,987   Whole Kingdom 29,802,623   2011   Rank Provinces Number 1 Bangkok 8,161,288 2 Samut Prakan 2,944,606 3 Chon Buri 2,138,995 4 Samut Sakhon 1,734,720 5 Pathum Thani 1,485,020 6 Chiang Mai 925,563 7 Nonthaburi 871,387 8 Phra Nakhon Si Ayutthaya 842,047 9 Nakhon Ratchasima 711,735 10 Songkhla 608,002   Whole Kingdom 29,877,932 Source : Social Security Office, Ministry of Labour Compiled by : Statistical Forecasting Bureau,  National Statistical Office