Canada sells a _significant_ amount to the US for medical purposes and legal sales.
For a while the #3 cash crop in BC, after fishing and logging, was weed. That can't all be for domestic consumption.
[0] https://www.canada.ca/en/health-canada/services/drugs-medica...
It’s not unusual for marijuana busts in the US to be measured in tons.
I’d assume total US consumption is probably in the thousands of tons of marijuana?