Year Percent change 1996 -0.75 1997 3.2 1998 -2.114 1999 3.293 2000 5.836 2001 3.96 2002 0.806 2003 2.677 2004 -2.167 2005 1.092 2006 3.117 2007 6.153 2008 4.052 2009 -1.42 2010 3.032 2011 2.784 2012 4.69 2013 1.35 2014 -0.5 2015 -0.35 2016 -0.21 2017 2.382 2018 0.84 2019 2 2020 2 2021 2.2 2022 2.2 2023 2.2 2024 2.2