Year % of GDP 1995 13.38212440023327 1996 12.492171369216958 1997 14.923611444635862 1998 12.830285286493773 1999 10.513438696345878 2000 12.949992899649732 2001 14.370915571501868 2002 15.671969601306476 2003 15.259877038020933 2004 15.071152009729621 2005 16.868273787731837 2006 16.35441846349565 2007 17.001570756142456 2008 14.907833201995436 2009 14.72718063756867 2010 18.32528262178573 2011 18.305165181906354 2012 18.18433345688381 2013 21.221235047264205 2014 23.08417846489208 2015 18.82686258532232 2016 18.134421604670912 2017 19.737318324039613 2018 20.639792111348104 2019 21.319356379743372 2020 21.858321160061738 2021 21.508246801907102 2022 21.38877729887922 2023 20.819466575512887