Based on the exchange rates for the first trading days of 2011 and 2012 shown in the accompanying table, did the U.S. dollar appreciate or depreciate during 2011? Did the movement in the value of the U.S. dollar make American goods and services more or less attractive to foreigners?

January 3, 2011 January 3, 2012 US$1.55 to buy 1 British pound sterling US$1.57 to buy 1 British pound sterling 29.08 Taiwan dollars to buy US$1 30.28 Taiwan dollars to buy US$1 US$0.99 to buy 1 Canadian dollar US$1.01 to buy 1 Canadian dollar 81.56 Japanese yen to buy US$1 76.67 Japanese yen to buy US$1 US$1.34 to buy 1 euro US$1.31 to buy 1 euro 0.93 Swiss franc to buy US$1 0.93 Swiss franc to buy US$1