According to the Center for Disease Control, in 2010, about 2.5 million emergency department (ED) visits, hospitalizations, or deaths were associated with TBI—either alone or in combination with other injuries—in the United States. In 2011, about 2,650 teens in the United States aged 16–19 were killed and almost 292,000 were treated in emergency departments for injuries suffered in motor-vehicle crashes. That means that seven teens ages 16 to 19 died every day from motor vehicle injuries. Young people ages 15-24 represent only 14% of the U.S. population. However, they account for 30% ($19 billion) of the total costs of motor vehicle injuries among males and 28% ($7 billion) of the total costs of motor vehicle injuries among females. In 2012, 3,328 people were killed in crashes involving a distracted driver, compared to 3,360 in 2011. An additional, 421,000 people were injured in motor vehicle crashes involving a distracted driver in 2012, a 9% increase from the 387,000 people injured in 2011. According to Sport Injuries.org, children ages 5 to 14 account for nearly 40 percent of all sports-related injuries treated in hospitals. On average the rate and severity of injury increases with a child's age.