Year Percent of GDP (Units) 1985 49.838 1986 56.210 1987 43.904 1988 49.743 1989 42.995 1990 121.520 1991 206.523 1992 76.771 1993 57.579 1994 56.977 1995 51.043 1996 41.929 1997 42.985 1998 50.902 1999 43.813 2000 29.330 2001 40.718 2002 42.124 2003 37.666 2004 34.922 2005 28.505 2006 32.051 2007 30.233 2008 40.690 2009 42.640 2010 45.281 2011 39.544 2012 38.039 2013 38.342 2014 44.912 2015 55.226 2016 53.976 2017 51.522 2018 50.798 2019 50.624 2020 64.557 2021 50.335 2022 39.614 2023 50.795 2024 50.385 2025 48.789 2026 48.571 2027 48.494 2028 48.605 2029 48.683