See report for details, graphs, data.
Links
[1] https://learnaboutsam.org/wp-content/uploads/2015/09/2015-FINAL-LEGALIZATION-OF-MARIJUANA-IN-COLORADO-THE-IMPACT.pdf
[2] http://rethinkpot.org/tags/colorado%2A
[3] http://rethinkpot.org/tags/potency
[4] http://rethinkpot.org/tags/youth-usage
[5] http://rethinkpot.org/tags/vehicle-0
[6] http://rethinkpot.org/tags/social-costs
[7] http://rethinkpot.org/tags/business