1 601 ฿ 1 508 ฿ 0 Jan 1 509 ฿ Feb 1 509 ฿ Mar 1 509 ฿ Apr 1 601 ฿ May 1 509 ฿ Jun 1 508 ฿ Jul 1 509 ฿ Aug 1 513 ฿ Sep 1 509 ฿ Oct 1 509 ฿ Nov 1 509 ฿ Dec 1 509 ฿