Year Percent change 2005 8.662 2006 19.302 2007 5.601 2008 1.035 2009 22.422 2010 -1.968 2011 -3.37 2012 0.262 2013 -1.105 2014 0.275 2015 9.784 2016 8.15 2017 5.082 2018 3.8 2019 2.5 2020 2 2021 2 2022 2 2023 2 2024 2