From Jan 2008 to Jan 2009 the Japanese yen to U. S. dollar exchange rate decreased from 107.81 yen per dollar to 90.12 yen per dollar. Which one of the following statements describes this change?

		U. S. dollar appreciated against the yen by approximately 16%.
		U. S. dollar appreciated against the yen by approximately 19%
		U. S. dollar depreciated against the yen by approximately 19%.
		U. S. dollar depreciated against the yen by approximately 16%.