1 509 ฿ 1 478 ฿ 0 Jan 1 478 ฿ Feb 1 478 ฿ Mar 1 478 ฿ Apr 1 478 ฿ May 1 509 ฿ Jun 1 509 ฿ Jul 1 509 ฿ Aug 1 509 ฿ Sep 1 509 ฿ Oct 1 509 ฿ Nov 1 478 ฿ Dec 1 478 ฿