Year Percent of GDP (Units) 1990 17.782 1991 22.608 1992 23.076 1993 22.229 1994 23.632 1995 21.880 1996 21.219 1997 20.769 1998 30.925 1999 28.925 2000 21.739 2001 22.452 2002 15.882 2003 13.034 2004 14.526 2005 8.388 2006 7.563 2007 4.440 2008 3.199 2009 5.805 2010 5.462 2011 4.442 2012 4.586 2013 4.661 2014 4.039 2015 13.857 2016 29.338 2017 40.106 2018 44.691 2019 52.464 2020 67.902 2021 61.264 2022 39.806 2023 36.375 2024 35.422 2025 33.467 2026 31.550 2027 30.031 2028 28.710 2029 28.665