<p>New York Times just had an article about this a few days ago:</p>
<p><a href="http://www.nytimes.com/2007/01/07/education/edlife/07spending.html?_r=1&ref=edlife&oref=slogin%5B/url%5D">http://www.nytimes.com/2007/01/07/education/edlife/07spending.html?_r=1&ref=edlife&oref=slogin</a></p>
<p>Hope this answers your question.</p>