Year Percent change 1997 5.732 1998 -0.279 1999 2.841 2000 7 2001 0.6 2002 -0.4 2003 0.5 2004 0.6 2005 4.3 2006 4.548 2007 4.944 2008 -0.45 2009 0 2010 3.287 2011 2.567 2012 1.802 2013 -1.377 2014 -0.499 2015 -1.303 2016 -0.203 2017 1.623 2018 1.642 2019 1.614 2020 1.615 2021 1.468 2022 1.576 2023 1.713 2024 3.826