PARCEL POST ZONE CHART PRICES
22Jan2017, replacing the one issued 2016April10
Parcel rates used to change in May, letters in January. Before
that, they couldn't change at all unless Congress passed
legislation. Imagine, a legislature that did legislation.
The good old days.
Current charts always available at http://pe.usps.com/cpim/ftp/manuals/dmm300/Notice123.pdf (you want domestic / retail prices / for ground), or
http://pe.usps.com/text/dmm300/Notice123.htm (same document, but in webpage format, not PortableDocumentFormat).