In 2013, 54 million people worldwide sustained injuries from traffic collisions. This resulted in 1.4 million deaths in 2013, up from 1.1 million deaths in 1990. About 68,000 of these occurred in children less than five years old. Almost all high-income countries have decreasing death rates, while the majority of low-income countries have increasing death rates due to traffic collisions. Middle-income countries have the highest rate with 20 deaths per 100,000 inhabitants, accounting for 80% of all road fatalities with 52% of all vehicles. While the death rate in Africa is the highest (24.1 per 100,000 inhabitants), the lowest rate is to be found in Europe (10.3 per 100,000 inhabitants).
Some bar associations and attorney organizations offer certifications, including certification of lawyers in the field of personal injury. Certification is not required to practice personal injury law, but may help a lawyer demonstrate knowledge in the field to potential clients. Within the U.S., not all state bars offer certification for personal injury law. Some states, such as New Jersey, allow lawyers to become Certified Trial Attorneys, a credential that is available to both plaintiff and defense attorneys. Some states, such as Arizona, restrict the use of the words "specialist" or "specialize" to lawyers who have obtained a certification from the State Bar Board of Legal Specialization in a specific field of law, with one such certification being in the area of personal injury law.