I think they're lying again.
The study showed that the number of drivers testing positive for marijuana increased 100 percent from 2007 to 2012, with marijuana-related fatalities doubling from 37 to 78. Traffic fatalities total around 500 a year in the state.
__________________________________________________________________________
2007 => Fatal crashes 508; Deaths 554; Deaths/100K pop 11.4
2012 => Fatal crashes 433; Deaths 472; Deaths/100K pop 9.1
___________________________________________________________________________
http://www.iihs.org/iihs/topics/t/general-statistics/fatalityfacts/state-by-state-overview/2007
http://www.iihs.org/iihs/topics/t/general-statistics/fatalityfacts/state-by-state-overview/2012