Year Percent of GDP (Units) 1990 30.965 1991 45.700 1992 50.421 1993 23.686 1994 19.551 1995 12.878 1996 9.305 1997 7.380 1998 7.789 1999 8.396 2000 10.362 2001 9.866 2002 10.541 2003 12.543 2004 16.512 2005 19.750 2006 18.824 2007 19.583 2008 19.712 2009 18.755 2010 17.351 2011 18.233 2012 16.482 2013 15.324 2014 13.510 2015 12.378 2016 9.976 2017 12.812 2018 16.840 2019 18.655 2020 10.728 2021 9.742 2022 17.696 2023 8.604 2024 9.241 2025 11.917 2026 11.841 2027 12.199 2028 12.209 2029 12.076