Colorado’s legal marijuana market is far exceeding tax expectations, according to a budget proposal released Wednesday by Gov. John Hickenlooper that gives the first official estimate of how much the state expects to make from pot taxes.

The proposal outlines plans to spend some $99 million next fiscal year on substance abuse prevention, youth marijuana use prevention and other priorities. The money would come from a statewide 10 percent sales tax on recreation pot, indicating Colorado’s total sales next fiscal year will be near $1 billion.

Retail sales began Jan. 1 in Colorado. Sales have been strong, though exact figures for January sales won’t be made public until early next month.

Read more: Governor: Colorado pot market exceeds tax hopes | Associated Press