Year Percent of GDP (Units) 1990 19.296 1991 17.504 1992 23.784 1993 19.612 1994 12.820 1995 16.047 1996 15.825 1997 15.231 1998 10.828 1999 19.049 2000 28.807 2001 27.635 2002 20.724 2003 21.011 2004 23.828 2005 22.720 2006 21.076 2007 17.018 2008 20.076 2009 10.105 2010 12.421 2011 17.729 2012 14.712 2013 11.483 2014 10.937 2015 7.251 2016 5.117 2017 6.576 2018 8.505 2019 7.832 2020 6.520 2021 7.077 2022 8.958 2023 9.616 2024 12.442 2025 12.832 2026 13.279 2027 13.195 2028 12.655 2029 12.966