1 601 ฿ 1 509 ฿ 0 Jan 1 601 ฿ Feb 1 509 ฿ Mar 1 509 ฿ Apr 1 509 ฿ May 1 514 ฿ Jun 1 540 ฿ Jul 1 540 ฿ Aug 1 540 ฿ Sep 1 540 ฿ Oct 1 540 ฿ Nov 1 540 ฿ Dec 1 571 ฿