Averages of daily figures. Noon buying rates in New York City for cable transfers payable in foreign currencies. Starting January 1999 derived using the official fixed euro conversion rates. **DISCONTINUED**
Federal Reserve Bank of St. Louis, Portugal / U.S. Foreign Exchange Rate (DISCONTINUED SERIES) [EXPOUS], retrieved from FRED, Federal Reserve Bank of St. Louis https://research.stlouisfed.org/fred2/series/EXPOUS/, July 30, 2015.