Year Percent of GDP (Units) 1992 4.343 1993 2.049 1994 3.025 1995 14.494 1996 13.227 1997 12.935 1998 14.141 1999 16.201 2000 19.371 2001 10.991 2002 10.608 2003 14.059 2004 13.143 2005 17.412 2006 20.981 2007 16.802 2008 15.201 2009 18.987 2010 22.443 2011 24.405 2012 25.763 2013 27.162 2014 29.939 2015 28.652 2016 29.895 2017 31.493 2018 32.537 2019 31.288 2020 26.987 2021 29.441 2022 29.905 2023 24.553 2024 24.412 2025 24.891 2026 25.664 2027 26.584 2028 27.570 2029 30.411