How many people are INFPs?

I feel like there more INFPs than other MBTI types when you look at meme pages, subreddits or the results on 16 personalities. But if you refer to the statistics, the INFP type isn‘t quite common. I wonder why it is like that? Are we more prone to such tests and more likely to discuss our personality/need to relate to other INFPs? Or are the statistics wrong/old what ever?