Year Percent of GDP (Units) 1990 6.246 1991 8.069 1992 9.177 1993 4.629 1994 30.247 1995 12.759 1996 9.176 1997 6.613 1998 14.168 1999 15.775 2000 10.192 2001 10.030 2002 7.342 2003 10.903 2004 11.175 2005 19.659 2006 31.979 2007 26.310 2008 25.178 2009 21.691 2010 32.515 2011 42.771 2012 39.655 2013 38.176 2014 26.683 2015 24.390 2016 29.788 2017 32.031 2018 33.173 2019 38.660 2020 38.134 2021 43.221 2022 37.448 2023 35.707 2024 36.731 2025 37.979 2026 37.982 2027 37.766 2028 37.197 2029 35.110