Year Percent change 2001 2.758 2002 4.431 2003 -28.974 2004 3.971 2005 5.856 2006 8.48 2007 13.103 2008 6.105 2009 5.192 2010 6.351 2011 7.7 2012 8.42 2013 8.836 2014 0.695 2015 0.007 2016 -1.63 2017 2.469 2018 1.242 2019 0.44 2020 1.553 2021 1.253 2022 -1.264 2023 -0.495 2024 3.75