Year Percent change 1993 2.8 1994 5.3 1995 4.1 1996 3.602 1997 5.114 1998 3.286 1999 5.274 2000 4.155 2001 2.95 2002 3.836 2003 2.842 2004 4.352 2005 4.003 2006 5.656 2007 6.942 2008 3.3 2009 -7.797 2010 1.238 2011 0.649 2012 -2.669 2013 -1.132 2014 2.951 2015 2.305 2016 3.068 2017 4.88 2018 4.491 2019 3.387 2020 2.83 2021 2.669 2022 2.29 2023 2.129 2024 2.138