Year Percent of GDP (Units) 1992 18.204 1993 16.035 1994 16.604 1995 12.638 1996 10.612 1997 13.948 1998 13.924 1999 21.251 2000 19.784 2001 20.343 2002 21.376 2003 22.014 2004 20.843 2005 23.273 2006 19.056 2007 20.898 2008 23.012 2009 30.094 2010 22.041 2011 22.359 2012 23.795 2013 21.558 2014 22.220 2015 23.195 2016 22.734 2017 23.240 2018 23.031 2019 22.202 2020 24.315 2021 21.076 2022 20.262 2023 18.949 2024 18.977 2025 18.503 2026 18.698 2027 18.573 2028 18.463 2029 18.287