Year Percent of GDP 1998 20.207 1999 18.659 2000 16.489 2001 14.383 2002 12.497 2003 12.253 2004 12.015 2005 12.151 2006 13.402 2007 14.338 2008 13.179 2009 12.677 2010 13.628 2011 13.939 2012 18.126 2013 22.561 2014 23.777 2015 24.208 2016 23.024 2017 20.887 2018 20.409 2019 20.871 2020 21.359 2021 21.586 2022 21.832 2023 22.053 2024 22.27