Mark,
Do you have the current numbers of how many teams are in each of the district systems? It's interesting to me that MAR seems to have a much higher percentage of teams registered for outside regionals than the other four district systems (possibly even combined?).
(P.S. Thanks for providing all this data every year!
)
EDIT:
After doing some quick calculations, it appears that 11 out of the 120 MAR teams are currently traveling to outside regionals in 2015, which is 9.17% of all MAR teams. Meanwhile, 8 of the 350(?) FiM teams are registered for outside regionals, or 2.29% of all FiM. Which that data, and the fact that there are only 1 NE FIRST team, 1 Indiana Team, and 0 PNW teams also attending outside regionals, it would appear that MAR has not only a greater percentage of teams competing at outside regionals than any other district system, but also a larger percentage than all of the other district systems combined.
EDIT 2:
Mark corrected me below, I switched up the amount of MAR and FiM teams traveling out-of-district for 2015. But the fact still stands, there are more MAR teams competing at outside regionals in 2015 than from all of the other district systems combined.