Year % of GDP 1990 28.61200923787529 1991 22.22222222222222 1992 27.173913043478258 1993 40.609137055837564 1994 44.41072331815883 1995 41.15054817426258 1996 39.364258570989215 1997 37.91047624240112 1998 39.58251739985559 1999 40.03573619064237 2000 39.89467691431825 2001 44.3475881023921 2002 44.07057842323334 2003 43.252800507592 2004 41.81645789909545 2005 39.62832214744472 2006 40.83288127467925 2007 40.47154694114051 2008 37.99144469407693 2009 42.17288461714405 2010 43.47499615758703 2011 44.13123077674169 2012 43.29360298909803 2013 45.42212964736982 2014 45.6520929770784 2015 47.74218663107552 2016 48.52289123634793 2017 47.63399780610508 2018 47.81066056245912 2019 48.42650595255767 2020 49.01182866798913 2021 48.696566579413044 2022 48.20254876355547 2023 47.81668512260279