標  題: USPS first-class postal rate history


1917-11-03     3 cents
1919-07-01     2
1932-07-06     3
1958-08-01     4
1963-01-07     5
1968-01-07     6
1971-05-16     8
1974-03-02    10
1975-12-31    13
1978-05-29    15
1981-03-22    18
1981-11-01    20
1985-02-17    22
1988-04-03    25
1991-02-03    29
1995-01-01    32
1999-01-10    33
2001-01-07    34
2002-06-30    37
2006-01-08    39
2007-05-14    41
2008-05-12    42
2009-05-11    44
2012-01-22    45
2013-01-27    46
2014-01-26    49
2016-04-10    47
2017-01-22    49
2018-01-21    50


Reference web site links:

http://www.springfield.k12.il.us/resources/math/PerformanceTasks/35/postalratehi
story.pdf

http://www.cnn.com/2001/US/01/07/postal.rates.02/index.html

http://www.usps.com/
http://www.usps.com/communications/newsroom/2009/pr09_018.htm
http://about.usps.com/news/state-releases/ny/2011/ny_2011_1018.htm
http://about.usps.com/mailpro/2012/dec/page3.htm

https://about.usps.com/who-we-are/postal-history/rates-historical-statistics.htm

https://about.usps.com/who-we-are/postal-history/domestic-letter-rates-since-1863.htm

https://en.wikipedia.org/wiki/History_of_United_States_postage_rates


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