A PDF buried there...
Police-Reported Motor Vehicle Traffic Crashes
.Fatal . .. . . . . . . . . . . . . . . . . . . . . . . . . . . 37,795
.Injury . . . . . . . . . . . . . . . . . . . . . . . . . . 2,003,000
.Property Damage Only. . . . . . . . . . . . . . . . . . . . 4,282,000
.Total . . . . . . . . . . . . . . . . . . . . . . . . . . . 6,323,000
Traffic Crash Victims . . . . . . . . . . . . Killed / Injured
Occupants
.Drivers . . . . . . . . . . . . . . . . . . 25,840 / 1,989,000
.Passengers . . . . . . . . . . . . . . . . 10,441 / 913,000
.Unknown . . . . . . . . . . . . . . . . . . . . . 105 / \ufffd
Nonmotorists
.Pedestrians . . . . . . . . . . . . . . . . . . 4,882 / 78,000
.Pedalcyclists . .. . . . . . . . . . . . . . . . 728 / 45,000
.Other/Unknown . . .. . . . . . . . . . . . . . . . 120 / 8,000
Total . . . . . . . . . . . . . . . . . . . 42,116 / 3,033,000
26% of fatal accidents which killed the driver involved alcohol. Almost 40% of fatal accidents in which the driver was 21-24 involved alcohol.
I don't see any stats regarding drug-induced impairment.
It's a long report with lots of figures. It's interesting, but doesn't seem to be prepared in a way that makes it easy to get answers to topics like you posed re driving impaired.
Cheers,
Scott.