Year Percent change 1998 42.6 1999 26.247 2000 4.262 2001 16.233 2002 44.118 2003 47.469 2004 8.005 2005 6.886 2006 16.551 2007 34.437 2008 20.911 2009 3.692 2010 5.924 2011 6.829 2012 0.36 2013 5.763 2014 5.143 2015 7.259 2016 9.099 2017 4.622 2018 5.944 2019 7.523 2020 6.695 2021 6.152 2022 6.146 2023 6.064 2024 6.064