Emojis are starting to flood Instagram, and the website's engineers are on a quest to sort out how people are using the yellow-faced emoticons. Apparently, their popularity skyrocketed after Apple released the iOS emoji keyboard and Android got native support. In just a single month after the iOS emojis came out, their usage on the website increased by 10 percent. Now, nearly 50 percent of all captions and comments have an emoji or two. Instagram's research has also revealed that folks in Finland insert emojis most frequently, with 63 percent of all text posted from the country containing at least one graphic. The US (38 percent) takes the ninth place in that list, after France (50 percent), UK (48 percent), Germany (47 percent), Italy (45 percent), Russia (45 percent), Spain (40 percent) and Japan (39 percent).