evidence: Michigan, New York, and Rhode Island also significantly decreased drug sentences, with Michigan and Rhode Island rolling back mandatory minimum penalties for drug offenses.33 Each of these states reduced their prison populations and their crime rates.34 More recently, Mississippi, Alaska, and Maryland have changed their drug sentencing and related policies, including revising mandatory minimums, reducing sentencing ranges, and establishing presumptive probation for certain offenses.35 And in the 2016 election, 58 percent of Oklahoma voters approved a ballot measure that converted drug possession from a felony to a misdemeanor.36 [...] - Carson and Anderson, "Prisoners in 2015"; University at Albany, Sourcebook of Criminal Justice Statistics. [...] - The Pew Charitable Trusts, "National Imprisonment and Crime Rates Continue to Fall" (2016), http://www.pewtrusts.org/en/research-and-analysis/fact-sheets/2016/12/national-imprisonment-and-crime-rates-continue-to-fall. For a discussion of the complex relationship between imprisonment and crime, see The Pew Charitable Trusts, "Q & A: Weighing Imprisonment and Crime" (2015), http://www.pewtrusts.org/en/research-and-analysis/q-and-a/2014/09/weighing-imprisonment-and-crime.