MN schools in NCAA tourney

Curious, have we ever had 4 MN programs in the NCAA tourney together prior to 2015? (MN, MSU, UMD, and St.Cloud)
MN schools make-up a full quarter of the teams competing this year. Hard to believe it would have happened previously, as prior to Hastings MN-State wasn't much of a factor, and UMD and St.Cloud often seemed to be on different trajectories at any given time.

Never this many before. Have been 3 a couple of times but it was too difficult to get us all in when we were in the same conferences. Could be much more common now

the better question is how many minnesota natives are in the tournamen? probably around 50%