Postage Rates and Historical Statistics
- Rates for Domestic Letters, 1863-2008 (pdf) (rtf)
- Rates for Domestic Letters, 1792-1863 (pdf) (rtf)
- Rates for Stamped Cards and Postcards, 1873-2008 (pdf) (rtf)
- Pieces of Mail Handled, Number of Post Offices, Income, and Expenses, 1789 to 2008 (pdf) (htm)
- Delivery Points, 1990 to 2008, in Millions (pdf) (htm)
The Bureau of Labor Statistics' CPI inflation calculator calculates the current values of past prices back to 1913. You can compare values back to 1774 at www.measuringworth.com.