30580 Original Chiangmai Sign Language 10-99 0 0 0 ~19 "Since there has never been a census of deaf people in Bangkok, the real number of signers is unknown. However, some estimate of the number of signers can be made... Using United Nations estimates for urban areas of 1 person out of every 1,000 person born profoundly deaf or becoming profoundly deaf at an early age, there would be an estimate of 19 deaf people over the age of sixty-five living in the area where OCMSL is used. The estimated number of users of OCMSL therefore is up to 19 remaining users." Original Chiangmai Sign Language On ~19 10-99