Researcher: Amusement park injuries of adults not tracked [UPDATE] COLUMBUS, Ohio, July 23 (UPI) -- A few thousand children suffer injuries -- mostly bumps and bruises -- on U.S. amusement park rides each year but adult injuries aren't tallied, a doctor says. Dr. Gary A. Smith, who directs the Center for Injury Research at Policy at Nationwide Children's Hospital in Columbus, Ohio, told NBC News no one studies how many grownups are hurt or killed on amusement park rides. Last week, a woman, Rosy Ayala-Goana, died after she fell from the Texas Giant roller coaster at the Six Flags Over Texas amusement park. "We don't have a really good system for catching all of these [injuries]," Smith said. He found about 4,400 children are hurt on such rides each year, though only about 67 require hospitalization, and suspects a similar number for adults would be found if anyone conducted such a study. The International Association of Amusement Parks and Attractions says about 297 million people safely rode 1.7 billion rides in the United States in 2011, NBC reported in May. A 2005 report by the Consumer Product Safety Commission showed 52 deaths were linked to amusement rides between 1990 and 2004. A spokesman told the network no later figures were available.