Year c1/c2 1988 166.1709 1989 199.5009 1990 166.4513 1991 147.2163 1992 146.7543 1993 154.2498 1994 165.6803 1995 193.9344 1996 221.8281 1997 191.6513 1998 193.5638 1999 200.8742 2000 231.7167 2001 189.0581 2002 162.3769 2003 150.2455 2004 192.4838 2005 207.5929 2006 231.5599 2007 245.3487 2008 219.9228
