Novice question about property tax

[TStoneMBD]

Sorry for the novice, non stock market question.

I have done some research on google about property taxes but the results are still very confusing. It seems that there isn't a website that tells you the property tax percentage of each state and it's very hard to find a website that even tells you the property tax of a specific state.

It seems that property tax is generally in the area of 3%. I thought it was 3% of 100% home value but it seems more like 3% of 50% of the home value.

Do property taxes adjust according to a sliding scale? If not, to own a $1,000,000 home means that you would be forced to pay anywhere between $15,000 and $30,000 property taxes each year?? How is anybody affording to live in these million dollar houses?

Could someone direct me to a source that fully explains property tax along with each state/county's percentage. Any other information is very much appreciated as well.