Year Percent change 1993 13.676 1994 -30.321 1995 8.334 1996 7.088 1997 28.216 1998 9.628 1999 -3.109 2000 14.419 2001 9.038 2002 5.03 2003 3.98 2004 13.73 2005 23.503 2006 7.487 2007 13.757 2008 2.372 2009 -12.885 2010 13.443 2011 12.046 2012 9.779 2013 1.078 2014 5.981 2015 3.114 2016 4.402 2017 6.238 2018 1.435 2019 1.2 2020 1.8 2021 1.8 2022 1.6 2023 1.6 2024 1.6