MannyL, thank you for asking.
Just “Downstate Illinois”, that’s all.
When the Post Office runs in the black, it makes the news. From July of 1999.
http://www.foxmarketwire.com/071599/stampside.sml
But usually, it’s more like this. From November of 1995.
August of 2000.
January 8, 2001
And bear in mind that there’s a lot of creative bookkeeping that goes on, just like in any other government agency.
FYI: http://www.postalwatch.org/
http://www.postalfamily.com/
http://www.usps.gov/