[Facts] Yes, much clearer this way.
Also, it's amazing to me that the popularity by letter length are nearly the same for the male and female list. Somehow I always thought girls got longer names on average.
The graphs look good! The length graphs are also clear now. Well done! :D I'm always happy with new stat toys.
I really only have one remark after browsing around a bit. 'Sample' was a confusing word to use for me (in the drop down list with 'rank' and 'percent'). I'd expect a word like 'births' or maybe even 'quantity'.