The number of applications for teaching positions in Newtown's public schools was 5.7 percent lower in 1993 than in 1985 and 5.9 percent lower in 1994 than in 1985. Despite a steadily growing student population and an increasing number of teacher resignations, however, Newtown dose not face a teacher shortage in the late 1990's.

Which of the following, if true, would contribute most to an explanation of the apparent discrepancy above?

【选项】Many of Newtown's public school students do not graduate from high school.