0,1
History of U.S. Postal Service
The basic domestic letter rate was 3 cents from 1863 to 1883, then 2 cents until 1917, then 3 cents until 1919 when it dropped to 2 cents for the last time.
Sequence in context: A176059 A029211 A018837 * A039639 A023509 A115041
Adjacent sequences: A097615 A097616 A097617 * A097619 A097620 A097621
nonn,fini
David Callan (callan(AT)stat.wisc.edu), Sep 20 2004