According to the Pennsylvania Driver's Manual, approximately _____ of all traffic deaths in the United States involve drunk drivers.

According to the Pennsylvania Driver's Manual, approximately 40 percent of all traffic deaths in the United States involve drunk drivers. (Note: According to the Centers for Disease Control and Prevention, this number has declined in recent years to 28 percent, but it still represents about ten thousand people killed per year in alcohol-related accidents.) [Alcohol and Driving, Driver Factors, Chapter 3: Learning to Drive; Pennsylvania Driver's Manual], ["Impaired Driving: Get the Facts," Centers for Disease Control and Prevention, https://www.cdc.gov/motorvehiclesafety/impaired_driving/impaired-drv_factsheet.html]