Year % of GDP 1995 10.923434048466534 1996 10.019317821411065 1997 12.016362539251414 1998 13.569373471961402 1999 12.277222703324538 2000 16.51989010685027 2001 17.48467099372812 2002 17.720084721517566 2003 17.268363409029007 2004 17.769480233038166 2005 20.76146148373478 2006 19.180639697292655 2007 22.50959705663836 2008 22.6098523115036 2009 20.452228230640745 2010 18.255897010058614 2011 19.833337043813348 2012 22.18038715215497 2013 19.982293734980118 2014 20.892886514498006 2015 22.056491977942812 2016 21.468335669041156 2017 21.33944411579817 2018 22.500733701233564 2019 22.122568869804137 2020 22.70765249807519 2021 21.858691006956384 2022 20.450077523980177 2023 19.13975615375495