Vermont college graduates staying in Vermont, sort of

This is an old report from VTDigger on Shumlin asking college graduates to stay in Vermont for jobs, but it's been rattling around in my head.  

Typically, the concern in Vermont is that our young folks raised in the state are leaving the state.  The study being done at St. Michael's doesn't really help with that question, because only 20% of their undergraduates are Vermonters (see last paragraph in the article).  The fact that 40% of the 2015 graduating class stayed in Vermont means that we have a net gain to the state population.

The key here is that this is among graduates of St. Michael's.  Does UVM collect this kind of data, and does it show a different story?