里面说的很清楚连parent plus loan都不算student loan。我举的例子可大都是白给的所谓的“奖学金”。你这数字里那个是明确说的白给的钱？

Sixty-six percent of all undergraduates received some type of financial aid in 2007–08. For those who received any aid, the total average amount received was $9,100. Fifty-two percent received grants averaging $4,900, and 38 percent took out an average of $7,100 in student loans. Seven percent received aid through workstudy jobs averaging $2,400 in wages, 2 percent received an average of $5,400 in veterans’ benefits, and 4 percent of students had parents who took out an average of $10,800 in Parent PLUS loans. Parent PLUS loans are included in total aid but are not included in student loans because they are loans for parents of dependent students.

这段里面38+7+2+4=51，总共66，剩下的15是什么呢？我没找到。这也就是我还不能完全否定你的数据的原因，够公平的了吧？