1 540 ฿ 1 495 ฿ 0 Jan 1 509 ฿ Feb 1 540 ฿ Mar 1 509 ฿ Apr 1 540 ฿ May 1 495 ฿ Jun 1 509 ฿ Jul 1 509 ฿ Aug 1 516 ฿ Sep 1 509 ฿ Oct 1 513 ฿ Nov 1 540 ฿ Dec 1 509 ฿