1 971 ฿ 1 767 ฿ 0 Jan 1 971 ฿ Feb 1 971 ฿ Mar 1 940 ฿ Apr 1 940 ฿ May 1 776 ฿ Jun 1 776 ฿ Jul 1 767 ฿ Aug 1 779 ฿ Sep 1 780 ฿ Oct 1 786 ฿ Nov 1 940 ฿ Dec 1 786 ฿