I thought it would be interesting to see the regional numbers for the last 3 years.  Here they are

it will be in this order Region year number of wrestlers in regional tourney, number of teams.

1 (17) 98-13,    (16) 111-12, (15) 110-11

2 (17) 133-14, (16) 138-14, (15) 113-13

3 (17) 105-13, (16) 103-13, (15) 126-13

4 (17) 89-13*, (16) 106-12, (15) 124-12

5 (17) 96-10,  (16) 98-10,   (15) 105-10

6 (17) 133-12, (16) 140-12, (15) 133-12

7 (17) 148-14, (16) 142-15, (15) 127-13

8 (17) 100-14*, (16) 109-14, (15) 118-12

* = one team had no entries.