Year Percent of GDP 1998 50.737 1999 53.361 2000 32.238 2001 30.842 2002 26.469 2003 22.171 2004 19.734 2005 19.116 2006 13.182 2007 4.384 2008 21.598 2009 26.734 2010 33.96 2011 33.61 2012 36.45 2013 37.174 2014 39.319 2015 38.372 2016 36.511 2017 30.999 2018 28.443 2019 28.585 2020 29.068 2021 28.878 2022 27.895 2023 27.652 2024 26.655