Year Percent of GDP (Units) 1992 14.440 1993 18.263 1994 21.975 1995 25.467 1996 25.106 1997 26.197 1998 27.195 1999 29.118 2000 28.903 2001 26.675 2002 25.445 2003 26.562 2004 28.797 2005 28.461 2006 30.291 2007 33.047 2008 32.886 2009 23.452 2010 22.361 2011 21.690 2012 18.759 2013 19.587 2014 19.374 2015 19.164 2016 18.427 2017 20.030 2018 21.309 2019 20.632 2020 20.061 2021 21.733 2022 24.280 2023 20.801 2024 22.215 2025 22.680 2026 22.743 2027 22.774 2028 22.908 2029 22.918