Year % of GDP 1993 32.83577852044305 1994 31.05883381003249 1995 29.08806722804238 1996 28.77991364662863 1997 27.84792098595531 1998 27.25092284368488 1999 27.953556620795695 2000 27.90990815285363 2001 25.39663061564382 2002 18.482845086802257 2003 20.35632002865308 2004 26.132551789502802 2005 31.333665284816316 2006 35.76587665691477 2007 42.09609508792965 2008 48.42130126273783 2009 49.90334878667901 2010 51.9828138697228 2011 52.09134267412504 2012 51.083376659967065 2013 50.35418039668301 2014 48.914311262124286 2015 47.97837877143811 2016 48.055940038012885 2017 46.52516436482786 2018 46.06755365272725 2019 45.00478900980762 2020 46.26693139150161 2021 44.68795841087592 2022 40.95802533997474 2023 37.929690105887985