Year % of GDP 1993 21.544091415326104 1994 18.31733819968872 1995 19.51752807308262 1996 19.442250887914845 1997 21.611886458829453 1998 21.92053965635453 1999 21.893057971196754 2000 26.038390088866098 2001 26.58791547643225 2002 26.393440527294064 2003 26.88221045040578 2004 27.20209821386109 2005 28.78365762253742 2006 30.027562969224547 2007 31.69478165617503 2008 28.251889028709954 2009 26.12380143131943 2010 28.009057395501546 2011 31.382422863809257 2012 31.011846948000755 2013 29.911911637296473 2014 30.64011249673662 2015 29.028054473572805 2016 28.809701713865838 2017 30.51929514340545 2018 30.756493400322444 2019 30.603989786561986 2020 29.402023326080805 2021 30.19762028679424 2022 29.036215710922114 2023 26.110084461603982