Year % of GDP 1993 20.58999349223498 1994 23.26561621596087 1995 24.57145173498535 1996 22.6162441541643 1997 20.40626704296215 1998 20.697603790738466 1999 21.926552259597564 2000 19.56198063887343 2001 18.629785966046708 2002 18.176560674355517 2003 17.846877542333825 2004 17.374606224377928 2005 16.85538649789699 2006 15.83499214750168 2007 15.899962771320919 2008 18.437418462222798 2009 20.534280847469716 2010 19.562532057472225 2011 18.365857069052606 2012 18.195154660890893 2013 18.644790189555334 2014 18.73089419482801 2015 19.576884938570707 2016 19.72445628108632 2017 19.25710049680254 2018 19.1291737338201 2019 19.437645547019233 2020 20.829670218898787 2021 19.99832140726131 2022 19.52255384091017 2023 20.920432239434124