Year per million people 1996 650.43249 1997 615.65794 1998 591.819 1999 561.88674 2000 506.59097 2001 496.59937 2002 432.54064 2003 432.29122 2004 452.80706 2005 429.39142 2006 422.60322 2007 498.31542 2008 539.39397 2009 419.60493 2010 541.3251 2011 462.47604