About 1/3 high school graduates in the USA take physics, compared with 70% and 96% for chemistry and biology, respectively files.eric.ed.gov/fulltext/EJ1...

Only 1/3 of all people teaching at least one high school physics class have a degree in physics or physics education. A lot of high school physics teachers are teachers in another STEM field who are asked to pick up 1-2 physics classes. Sorry to get off topic. The original question is interesting.