Year Percent of GDP (Units) 1980 29.297 1981 35.668 1982 29.643 1983 32.598 1984 22.912 1985 21.113 1986 24.332 1987 21.943 1988 28.293 1989 16.120 1990 35.962 1991 31.028 1992 41.942 1993 38.615 1994 35.729 1995 5.572 1996 10.242 1997 22.473 1998 12.201 1999 25.850 2000 48.427 2001 28.932 2002 34.305 2003 44.628 2004 39.867 2005 32.005 2006 42.939 2007 37.053 2008 49.533 2009 40.192 2010 54.044 2011 50.017 2012 57.460 2013 57.835 2014 54.628 2015 40.415 2016 26.015 2017 42.012 2018 47.832 2019 37.475 2020 36.282 2021 34.962 2022 44.946 2023 31.740 2024 30.700 2025 28.085 2026 26.277 2027 24.644 2028 22.564 2029 21.474