Flags with Unique Aspect Ratios (Proportions)

Most flags have aspect ratios of of 1:2 (50%), 3:5 (60%), or 2:3 (67%). Multiple countries even have flags that are 3:4, 8:11, 5:7, 7:10, 5:8, 4:7, or 10:19 (like the USA!). Name the remaining countries, which have flags with unique aspect ratios not shared by any other country.