I recently read chapter 168 of Yona of the Dawn online, which was the latest one at that time.
Since volume 16 of Yona of the Dawn is going to be released January 5th, 2019, I was thinking of buying volume 15 for a Christmas present for myself. I was wondering if volume 15 stops at that chapter or continues. If it continues, then I plan to buy it. If not, then I'll probably wait for volume 16.
How many chapters does volume 15 have and what are their numbers?