<p>By significant, I mean 25% or greater. I've found:</p>
<p>UC Irvine - 55%
UC Berkeley - 45%
UC Riverside - 44%
UC Davis - 43%
UC Los Angeles - 41%
University of the Pacific - 35%
UC Merced - 32%
University of Washington - 31%
UC Santa Cruz - 25%
Stanford - 25%
University of Southern California - 24% (pretty close)
University of British Columbia in Canada</p>
<p>Are there any others? College Board doesn't have the statistics for UBC or UC San Diego.</p>