States that decriminalized marijauna are Alaska, California, Colorado, Nebraska, New York, North Carolina, Maine, Minnesota, Ohio, and Oregon. These state legislatures ( except Alaska's ) decriminalized marijuana possession in the 1970s. Oregon was the first, in 1973, following the recommendations of the Nixon administration's National Commission on Marijuana Use ( also known as the Shafer Commission ). Nebraska was the last, in 1979. Another state, Mississippi, decriminalized marijuana possession in the '70s but later recriminalized it as a misdemeanor offense.
California decriminalized marijuana in 1976, and, within the first six months, arrests for driving under the influence of drugs rose 46 percent for adults and 71.4 percent for juveniles. Peggy Mann, Reasons to Oppose Legalizing Illegal Drugs (Danvers: Committee of Correspondence, Inc., September, 1988)
Decriminalizing marijuana in Alaska and Oregon in the 1970s resulted in the doubling of use. Wayne J. Roques, "Decriminalizing Drugs Would Be A Disaster," The Miami Herald 20 January 1995
You said "legalized". You were incorrect. Bigtime. How many other leaps like this have you made? Who cares...