The exchange rate between the United States and Canada can be stated as the number of Canadian dollars that can be purchased with

$1. The official values for the year are 1998 1999 2000 2001 2002 2003 1.48 1.49 1.48 1.55 1.57 1.40 2004 2005 2006 2007 2008 1.30 1.21 1.13 1.07 1.07 Year 1992 1993 1994 1995 1996 1997 Exchange rate 1.21 1.29 1.37 1.37 1.36 1.38 Is this exchange rate in statistical control?

Make a time plot and comment.