Where did you work? That might have some impact on your personal experience. A large proportion of emergency calls in PDX involve heroin and meth overdoses, not to mention injuries inflicted while under the influence of one or more of the substances you listed above.
Even with the "tougher" DUI enforcement of late, I think we are too soft. There are far too many people driving around on the road with multiple DUI offenses.
On my short stint in the ER Meth was 50% of the ER visits. Alcohol 15%.