probably 80-100% are associated with HPV
. Only one type actually is involved, HPV
-16. The rate of such cancers
has been rising in recent years, but it's currently in the ballpark of 10,000 cases per year in the US. That's a very small number in a population of 320 million, far less frequent than common cancers like breast, cervix, lung, colon, lymphomas, etc.
Millions of people acquire oral HPV infections whether by oral sex or perhaps other routes.