1995 1,765
1996 1,798
1997 1,712
1998 1,341
1999 1,269
2000 1,132
2001 1,072
2002 1,156
2003 1,057
2004 910
2005 903
2006 931
2007 881
2008 803
2009 832
2010 743
1995 8.3
1996 8.4
1997 7.9
1998 6.1
1999 5.7
2000 5.1
2001 4.8
2002 5.1
2003 4.7
2004 4.0
2005 4.0
2006 4.0
2007 3.8
2008 3.5
2009 3.6
2010 3.2
