Published earlier this month by the National Highway Traffic Safety Administration (NHTSA).
From the Report:
This fact sheet contains estimates of driver alcohol involvement in fatal crashes for the United States and individually for the 50 States, the District of Columbia, and Puerto Rico. Estimates for Puerto Rico are not included in the national estimates. Data from the current year (2013) and 10 years ago (2004) are presented for comparison. These estimates are based on data from the Fatality Analysis Reporting System (FARS).
From the Key Findings
Of the 32,719 motor vehicle traffic fatalities in 2013, there were 10,076 (31%) people killed in alcohol-impaired-driving crashes where at least one driver in each crash had a blood alcohol concentration (BAC) of .08 grams per deciliter (g/dL) or higher.
The following States had the highest percentages:
South Carolina (44%)
North Dakota (42%)
Montana (40%), and Texas (40%)
Of the 44,574 drivers involved in fatal crashes in 2013, there were 9,461 (21%) who were alcohol-impaired.
In 2013, the percentages of alcohol-impaired drivers involved in fatal crashes ranged from 13 percent (Utah) to 32 percent (South Carolina), compared to 21 percent in the United States.