From my experience:  I have seen more black legged ticks in the past two years than prior years.  Minnesota has reported more cases of tick/human disease occurring each year and the areas it has been reported from seem to have moved in a northerly direction.  Overall it still seems to be relatively uncommon to get Lyme in the BW and Q.  I believe partially because it is not a very pasture/meadow environment and the ticks are less likely to be in the woods.