50 and <=100]]> China, Russia, North Korea, South Korea, Japan 50-100 mm 41618980 23 6771918 90640 11592580 19727313 3436529 3 0 6 11 1 100 and <=250]]> China, North Korea, South Korea, Japan 100-250 mm 52560993 34 13880579 0 9925350 28745301 9763 8 0 6 18 0 250 and <=500]]> North Korea, South Korea 250-500 mm 620591 0 0 0 575681 44910 0 0 0 0 0 0 500 and <=750]]> 500-750 mm 0 0 750 and <=1000]]> 750-1000 mm 0 0 1000 and <=10000]]> more than 1000 mm 0 0