Year Percent of GDP (Units) 1995 13.087 1996 16.781 1997 17.698 1998 17.867 1999 19.206 2000 21.102 2001 21.499 2002 20.368 2003 21.308 2004 21.772 2005 22.006 2006 20.951 2007 17.183 2008 15.758 2009 22.556 2010 28.617 2011 34.660 2012 41.742 2013 59.033 2014 63.833 2015 63.626 2016 62.693 2017 60.168 2018 53.420 2019 49.484 2020 56.666 2021 55.800 2022 55.190 2023 52.280 2024 51.532 2025 51.188 2026 50.711 2027 50.180 2028 49.482 2029 48.369