Year Percent change 2003 8.692 2004 0.671 2005 11.83 2006 5.361 2007 13.34 2008 3.863 2009 20.585 2010 8.438 2011 6.479 2012 13.968 2013 5.683 2014 2.697 2015 0.988 2016 2.164 2017 2.665 2018 2.3 2019 3 2020 3.5 2021 3.997 2022 4.495 2023 4.992 2024 5.489