I don't have the exact numbers, but I would say, given the work I've done on the Minamata Convention on Mercury, that the vast majority of air pollution from mercury comes from foreign sources. About 95% of deposition comes from Asia, the U.S., and other countries, and it is deposited quite often in our north. The contribution from the domestic use of products would be on a somewhat different order of magnitude.
We do know from one study that an expected 200 kilograms of mercury was released to the air from products, and our numbers showed 1,300 kilograms deposited in landfill sites.