So I went through and counted for each continent. In areas where states can set their own I used the lowest age a state could set it. Puberty aoc is just one state in Mexico. Since 16 is far more common in the U.S. than 17 or 18 I think it's fair and easier for the records than counting each state individually. For territories since they are closer to semi autonomous I included them in the countries. It would also be very difficult to separate them.
I used the countries map of AOC from Wikipedia. So if anything is off there I'd love to hear it and I can update. I did not include any countries where the aoc is must be married as some states in the United States you can marry a very young girl and it would be legal to have sex with her. And has been done in America even recently several times under 12 yo.
15 yo - 5
16 yo - 15
18 yo - 8
So 16yo and over -115
15yo and younger -62
So I don't think America has a higher AOC than normal compared to the world. Now the cultural aspects I am far more likely to agree on. Just not the legal. Unless the data is off someway.