In this photo taken Monday, July 27, 2015, workers prepare to bring food orders to customers at an Ivar's restaurant in Seattle. After Seattle's new minimum wage law took effect last April 1, Ivar’s Seafood Restaurants announced that it was jacking up its prices by about 21 percent, eliminating tipping as a routine procedure, and immediately paying all its hourly workers a $15 per hour. They began the new pay rate three years earlier than the law required. (AP Photo/Elaine Thompson)

DENVER | A gradual hike in the minimum wage to $12 by 2020 will be decided by Colorado voters this fall.

A ballot measure to hike the minimum wage was certified by the Secretary of State Thursday as having the sufficient 98,000 or so signatures to make statewide ballots.

Colorado’s current minimum wage is $8.31 an hour. The ballot measure would raise that to $9.30 an hour next year. Then the wage would go up 90 cents an hour each year until the wage is $12 an hour by 2020.

Supporters say that minimum wage hikes could be on ballots in five states this fall.

The wage measure is the fourth question going to Colorado voters. Two are technical changes from the state Legislature, and one is a universal health care proposal.