According to preliminary figures released Thursday, overall transportation fatalities in the United States fell 4 percent year over year from 2006 to 2007 and did include a larger reduction in aviation fatalities. Aviation deaths, specifically, decreased from 784 to 545, with general aviation as the segment's largest contributor. In 2007, nearly 90 percent of aviation deaths were attributed to general aviation accidents. For 2006, 703 of the 784 deaths were attributed to general aviation. For 2007, the numbers show 491 of 545 deaths attributed to GA. The numbers were delivered independent of total hours flown. Overall, there were 43,193 transportation fatalities recorded in 2007 versus 45,085 in 2006. Highway fatalities, the segment that accounts for nearly 95 percent of all transportation deaths, also dipped in 2007 from the previous year. Within that category, however, motorcycle fatalities were marked by a 6 percent increase -- the single largest increase in any specific category across all the included modes of transportation.