Today's edition of Inside HigherEd has the details. While I'll have to ask you to head over there for a discussion of the factors behind this year's surge in women's enrollment, here are the numbers from the report:
MIT : 44 percent overall and 38 percent in engineering in 2006-07
Caltech: 37 percent in this year's freshman class.
Rensselaer Polytechnic: 31 percent in this year's freshman class.
Michigan Tech: 26 percent in last year's freshman class.
Worcester Polytechnic: 26 percent in this year's freshman class.
Georgia Tech: "a little over 30 percent" for the last several years.