Year Per 100 People 1990-01-01 0.000000000000 1996-01-01 0.008832980441 1997-01-01 0.017237400740 1998-01-01 0.025231461018 1999-01-01 0.041038722908 2000-01-01 0.064080807949 2001-01-01 0.089901370457 2002-01-01 0.320461975540 2003-01-01 0.558576244860 2004-01-01 1.286137641300 2005-01-01 3.549155718000 2006-01-01 5.545036083000 2007-01-01 6.770000000000 2008-01-01 15.860000000000 2009-01-01 20.000000000000 2010-01-01 24.000000000000 2011-01-01 28.430000000000