1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 63.3583 60.2583 60.1417 66.0417 68.95 66.2 71.3583 77.5083 74.2333 67.3667 69.2167 73.5083 73.825 73.8833 73.9 77.7667 96.225 109.75 118.25 106.45 Year $/ton