Where iin the Lower 48 are TC's the most popular, least...?

We did a month long cross country drive in our tc last spring. In an effort to keep my wife occupied,I had here count all the tc's we came across.(We are simple folk and easily amused).
MA-1
NY-6
PA-3
IND-1
ILL-8
IA-3

SD-28
WY-28
MT-80
ID-46
WA-4
OR-45
CA-37
NV-20
WI-2
MN-6
OH-3

Next trip through the SE we hope to count dead armadillos!