year East (36) North (34) Southeast (24) West (304)
1992 10.3 1 22.2 19.7
1993 11.3 0.9 19 19.8
1994 10.1 0.9 16.4 20.3
1995 12.2 0.9 19.4 20.8
1996 16.6 1 17.9 20.8
1997 12.9 1.1 25.6 21
1998 13.2 1.2 28.8 21
1999 10.6 1.2 22.2 21.6
2000 10.9 1.2 24.7 20.8
2001 10.2 1.2 22.8 20.7
2002 9.1 1.2 18.7 20.6
2003 9.1 1.5 22.4 21
2004 9.6 1.6 20.4 21.3
2005 10.3 1.3 22 21.5
2006 10.5 1 22.5 21.3
2007 10.6 1.1 22 21.5
2008 13.2 1.2 21.4 20.8
2009 11.8 1.2 24.2 20.5
2010 11.3 1 21.1 20.9
2011 10.1 1.2 22.4 20.1
2012 10.8 1 26.3 19.7