Yep, resurrected veteran teams.
I updated the image with a legend.
The red will decrease as the Israeli teams finally show up.
The 2011 dip was Washington state balancing experienced/rookie teams between the Cascade and Olympic regional playing fields (all at the same location). What they did was over several days they removed all the teams and then put them back onto different fields.
http://www.firstwa.org/Team-Resource...ld-Assignments