Arizona voters have approved a measure that will legalize medical marijuana in the state.

Proposition 203 won by a tiny margin of just 4,341 votes out of more than 1.67 million votes counted. The measure started out losing by about 7,200 votes on Nov. 2 and the gap gradually narrowed in the following 10 days.

The measure began Friday losing by about 1,500 votes, then
surged ahead by 4,421 votes.

Arizona will be the 15th state with a medical marijuana law.

Maricopa was the only Arizona county with ballots still outstanding on Saturday. The county says it finished counting all the remaining provisional and early ballots Saturday.

The final, unofficial count was 841,346 in favor of the measure and 837,005 opposed.