SEOUL, March 8 (Yonhap) -- The number of South Korea's kindergarten students has increased while that of students from primary and secondary schools decreased over the past three years, a government tally showed Friday. According to the statistics announced by the state-run Korean Educational Development Institute, the number of children attending preschools across the country totaled 613,749 last year, or a 14.2 percent jump from 537,361 tallied in 2009.