Year Percent of GDP (Units) 1992 13.744 1993 4.882 1994 20.745 1995 16.814 1996 20.077 1997 25.592 1998 21.574 1999 21.230 2000 17.916 2001 18.318 2002 17.373 2003 18.287 2004 20.051 2005 18.774 2006 20.154 2007 20.202 2008 18.563 2009 17.489 2010 17.910 2011 17.035 2012 15.925 2013 17.200 2014 18.094 2015 22.586 2016 21.911 2017 24.020 2018 23.769 2019 24.437 2020 22.250 2021 23.026 2022 23.529 2023 23.406 2024 23.686 2025 23.523 2026 23.236 2027 23.713 2028 23.737 2029 23.981