One statewide ballot measure has been certified for 2019 so far. 10 years ago, voters in 7 states decided the fate of 32 ballot measures.

 

Three things to know from 2009.

— Maine veto referendum: In 2009, the Maine state government legalized same-sex marriage. That November, voters approved a veto referendum, nullifying the law that had been passed earlier that year. Maine voters would later approve a ballot measure in 2012 to legalize same-sex marriage. The 2009 veto referendum passed by a vote of 52 percent to 47 percent.

— Casinos in Ohio: Voters in Ohio approved a citizen initiative to authorize the construction of casinos in Cincinnati, Cleveland, Columbus, and Toledo. The ballot measure attracted nearly $75 million in support and opposition spending. Since 2009, voters nationwide have seen 42 statewide ballot measures related to gambling.

— The 7 states that saw statewide measures was the second-lowest odd-year figure from the past 30 years. Since 1987, odd-year ballots saw an average of 50 measures across 11 states.