Year Percent of GDP (Units) 1992 8.824 1993 7.698 1994 27.942 1995 20.809 1996 21.095 1997 23.266 1998 22.686 1999 20.769 2000 18.232 2001 15.844 2002 18.159 2003 24.392 2004 22.919 2005 28.371 2006 33.550 2007 38.161 2008 43.809 2009 33.822 2010 29.419 2011 27.001 2012 22.759 2013 22.125 2014 21.025 2015 21.204 2016 18.016 2017 18.422 2018 22.400 2019 17.409 2020 19.664 2021 22.964 2022 21.634 2023 21.329 2024 21.048 2025 21.394 2026 20.893 2027 20.721 2028 20.382 2029 19.902