Year Percent of GDP (Units) 1990 9.787 1991 9.718 1992 9.210 1993 9.059 1994 10.162 1995 9.006 1996 4.429 1997 1.511 1998 4.729 1999 8.135 2000 10.063 2001 6.879 2002 6.063 2003 10.505 2004 10.237 2005 9.852 2006 7.083 2007 7.872 2008 4.938 2009 6.188 2010 4.620 2011 3.170 2012 5.399 2013 7.636 2014 7.474 2015 7.152 2016 7.600 2017 7.462 2018 7.473 2019 7.114 2020 3.516 2021 6.820 2022 5.784 2023 5.961 2024 5.278 2025 4.743 2026 4.549 2027 4.590 2028 4.339 2029 4.160