Year % of GDP 1995 20.37418434430701 1996 20.582929991085503 1997 22.373568290205917 1998 23.885486355289018 1999 21.95271970279877 2000 19.149112898115817 2001 20.540552474590207 2002 20.72070475865162 2003 21.563248423603227 2004 22.920279177409864 2005 23.409904793263543 2006 25.954456710310453 2007 28.60504413826941 2008 26.066449894300586 2009 17.88495489183465 2010 16.85926787107564 2011 18.459884367577555 2012 17.324168696812404 2013 18.421693937143754 2014 18.869990744727545 2015 19.611166458851564 2016 19.85769453231796 2017 20.114791510713438 2018 20.940067396347764 2019 21.504059710174765 2020 21.38189646329293 2021 21.706524264349017 2022 21.40104703181897 2023 23.292987949811867