Year Percent of GDP (Units) 1989 21.069 1990 26.334 1991 22.885 1992 20.082 1993 21.537 1994 20.081 1995 21.201 1996 24.914 1997 25.865 1998 19.908 1999 24.006 2000 23.692 2001 28.373 2002 24.793 2003 27.379 2004 27.715 2005 35.528 2006 42.588 2007 37.568 2008 48.063 2009 29.189 2010 38.514 2011 43.938 2012 37.893 2013 39.542 2014 37.830 2015 23.483 2016 24.264 2017 21.029 2018 23.008 2019 24.457 2020 20.004 2021 22.565 2022 31.794 2023 26.538 2024 26.491 2025 25.796 2026 25.244 2027 25.042 2028 24.623 2029 24.468