What is the percentage of Americans that watch Naruto?

Assuming the population of the world is 8 billion, and that around 60-70 million people watch anime. Around 0.875 % of the world watches anime. Something you have to realize is that anime only airs on TV in Japan, and only absurdly popular anime gain English dubs for being aired in the Western world. People that watch English subbed anime only number upto 500-700 hundred thousand on an average.