Karen,
Out of curiosity, I duplicated your spreadsheet and extended it to show the
figures after the now-scheduled convention in Tucson. The percentages are
only slightly altered: West 22% vs 21%; Central 46% vs 47%; East 32%
unchanged.

Then to see what it would take to reach your ideal 30%/40%/30%, I started
adding conventions in the West: To reach 28%/43%/29% would require that
the 5 conventions following the the Fall 2018 one would also have to be
held in the West (through Spring 2021). So, I guess it could be said that
the West has been shortchanged over the years.

Bottom line, I don't think there's any possibility of ever "catching up" to
the parity of 3/4/3, so perhaps the objective should be basically what it
has been: We'd LIKE to have more conventions farther West, but...

Even with all this number crunching, an "equitable distribution" really
hasn't been calculated. Seems to me we'd have to plot every GMCMI member's
geographic coordinates, determine the center of those and then figure some
distribution around that central location. I'm not up to it.

I don't know that this adds anything to the discussion, but it did satisfy
my curiosity, and convinced me that the GMCMI management over years of the
club's existence has done an amazingly good job of choosing locations.

Ken H.