The Canadian dollar's value against the U.S. dollar has seen some significant changes over recent history. Use the following graph of the C$/US$ exchange rate for the 30-year period between 1980 and end-of-year 2010 to estimate the percentage change in the Canadian dollar's value (affectionately known as the "loonie") versus the dollar for the following periods.

a. January 1980-December 1985

b. January 1986-December 1991

c. January 1992-December 2001

d. January 2002-December 2006

e. January 2007-December 2008

f. January 2009-December 2010

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Monthly Average Exchange Rates: Canadian dollars: 1.00 USD 1.7 1.6 1.5 1.4 1.3 1.2 1.1 1.0 10 80 Source PACIFIC Exchange Rates © 2010 by Prof. Werner Antwoilor, University of British Columbia, Vancouver BC, Canada. 85 95