Year % of GDP 1996 10.9909814975807 1997 8.29243806887032 1998 11.6679231619366 1999 7.98718944099379 2000 7.12522458023743 2001 8.65337656761909 2002 10.0898585093074 2003 14.1322681192345 2004 15.7819282736445 2005 20.0582548606141 2006 26.005425621115 2007 33.9999546690076 2008 35.9147042445964 2009 37.0103192975854 2010 38.2938865456568 2011 37.4346281834588 2012 35.9574441411582 2013 34.1713330371029 2014 31.0870894438793 2015 29.9040244065065 2016 28.5591065369669 2017 26.6684886465167 2018 25.5307563729682 2019 24.6232684392269 2020 25.7788673102855 2021 26.4205445206914 2022 24.9206062374772 2023 23.0381349641263