Z}A:"pppA7@(Geographic region of the U.S.A7@VGGeographic region of the U.S.A7@S1S.Cent0QZ1O1A7@S6kS.East0QZ6kO6kA7@SWMt.Pac0QZWOWA7@S{aN.Cent0QZxOxA7@bS.Cent0A7@S.East0ffA7@)Mt.Pac0((A7@<7N.Cent0::A7@N~N.East0M;M;p0O{aO0OpQ(1Q:1QM;1pA&@2x5 Symbol size increases with |Diff| / (Critical Diff)@x1 Symbol size = 0 if |Diff| / (Critical Diff) < 1