Year % of GDP 1992 23.341625207296847 1993 16.438445303180156 1994 14.947547493463508 1995 12.329386012482868 1996 12.15215514437333 1997 11.40677902750513 1998 8.565795102706542 1999 9.886348640434212 2000 8.11078388505165 2001 8.724831863770838 2002 7.995909092798879 2003 7.862206026992383 2004 7.122957987519979 2005 6.369523015558665 2006 5.49583486199441 2007 5.660291519070267 2008 5.315803246552191 2009 6.146884986500485 2010 4.510527529556141 2011 4.988974155757604 2012 4.288330156298334 2013 4.503545569627106 2014 4.329552461644731 2015 4.710547418815792 2016 4.556004270706594 2017 4.516984540267412 2018 4.395858102876359 2019 4.466335958127513 2020 5.391282693448097 2021 5.030001939963306 2022 5.247144807300736 2023 4.2847629790506945