Why do college offer need-based aid to Internationals?

<p>This "rise" shows up a Yale:</p>

<p><a href="http://www.yale.edu/oir/book_numbers_updated/D7_Summary_YC_Admissions_1979_2001.pdf%5B/url%5D"&gt;http://www.yale.edu/oir/book_numbers_updated/D7_Summary_YC_Admissions_1979_2001.pdf&lt;/a&gt;&lt;/p>

<p>Foreign Students (excluding Canadians) from 1992 to 2001 </p>

<h1>of Matriculants 32 30 43 46 22 46 51 67 66 74</h1>

<p>% of Total Matriculants 2.5% 2.3% 3.1% 3.6% 1.7% 3.5% 3.9% 4.9% 4.7% 5.7%</p>