Year Percent change 1998 2.536 1999 1.426 2000 1.624 2001 -2.578 2002 23.562 2003 -1.578 2004 13.226 2005 30.262 2006 9.97 2007 22.12 2008 10.307 2009 -3.61 2010 -3.425 2011 -4.837 2012 3.829 2013 -0.752 2014 -2.985 2015 5.75 2016 0.571 2017 -5.061 2018 1.403 2019 0.496 2020 0.638 2021 0.187 2022 0.882 2023 0.264 2024 1.7