Palau and the Democratic Republic of Congo are the top 2 countries with the highest limit for blood alcohol concentration (BAC). Here is a list of all the countries by their BAC limits.
Here is a full list of countries by their registered vehicle numbers. United States is at the top of the list by more than 265 million. It is also interesting that, although the population of US is almost 25% of China, they have more recorded vehicles in the country.
After the peak in 2002, the rate of road traffic crashes involving alcohol (% of all traffic crashes) in the United Kingdom has been on a steady decline since.
After 2002, the road traffic crashes involving alcohol in the UK have had a significant decrease and lessened to 12.2 per 100.000 population in 2012.
Check out the countries that do not have a law about wearing a seat belt while driving. It is interesting that most of the African countries are not paying enough attention to safety.