1994 5795 NA
1995 5885 1.55306298533218
1996 6428 9.2268479184367
1997 6481 0.82451773490977
1998 6292 -2.91621663323561
1999 6125 -2.65416401780038
2000 6462 5.50204081632653
2001 6243 -3.38904363974002
2002 6432 3.02739067755887
2003 6557 1.94340796019900
2004 6228 -5.01753850846424
2005 5960 -4.30314707771355
2006 5793 -2.80201342281879
2007 5451 -5.90367685137235
2008 5039 -7.55824619335902
2009 5008 -0.615201428854932
2010 4459 -10.9624600638978