You can find the exact numbers by going into the common data set. Every good school has one. There is no way to know the 2017 yet because they don’t have the numbers until after May.
Google ‘common data set rensellaer’ and you can pick the year from the list. Then do a ctrl-F to search the word admitted for the section having to do with the rate. I’d link you to it but I’m on the phone traveling at the moment.