DENVER -

A proposal to raise the tobacco age to 21 in Colorado is up for its first review in the state Legislature.

The bipartisan bill would make Colorado the first with a statewide 21-to-smoke law. It's before the House Health, Insurance, and Environment Committee Thursday afternoon.
    
People who are currently between the ages of 18 and 20 would be grandfathered in, meaning the measure wouldn't be fully implemented until today's 17-year-olds are 21.
    
It's not clear how many of Colorado's current smokers are younger than 21. However, a paper published last year in the journal Annals of Internal Medicine said that 9 out of 10 daily smokers have their first cigarette by 18 years of age.