On this R-data statistics page, you will find information about the USstamps data set which pertains to USstamps. The USstamps data set is found in the Stat2Data R package. You can load the USstamps data set in R by issuing the following command at the console data("USstamps"). This will load the data into a variable called USstamps. If R says the USstamps data set is not found, you can try installing the package by issuing this command install.packages("Stat2Data") and then attempt to reload the data. If you need to download R, you can go to the R project website. You can download a CSV (comma separated values) version of the USstamps R data set. The size of this file is about 207 bytes.

USstamps

Description

Price of US stamp for first class mail 1885-2012

Format

A dataset with 25 observations on the following 2 variables.

R project statistics dataset table

Year	Years when stamp price changed
Price	Cost of a US first class stamp (in cents)

Details

The data record the year and price for each change in price for a US first class (1 ounce, domestic letter) stamp since 1885.

Source

http://about.usps.com/who-we-are/postal-history/domestic-letter-rates-1…

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Dataset imported from https://www.r-project.org.