Delaware’s that way too I believe. The Gov is 1, the Lt.Gov is 2. The “civilian” with the lowest numbered plate, maybe it’s 5 or 6, used to be an old lady who turned down big money every once in a while to transfer it.
http://www.delmarvanow.com/apps/pbcs.dll/article?AID=/20080124/DCP01/80123073/1058/DCP
Ah there we go, “#6 to be auctioned for $1M”