Year % of GDP 1987 36.92313466479005 1988 37.067090827807306 1989 40.34246015033442 1990 43.36467248314742 1991 44.7169710012297 1992 49.121442051570945 1993 49.10785825393986 1994 46.965792319873266 1995 48.931893302930604 1996 49.071384357790585 1997 49.72086672786645 1998 50.453685044160665 1999 49.344464561474815 2000 48.925443057980566 2001 49.10586788095781 2002 49.377114782387935 2003 48.886219496326284 2004 47.81488281393651 2005 47.735799148631926 2006 47.83761330024632 2007 48.695344414674494 2008 48.14669312964776 2009 49.922188690264505 2010 49.3386427981634 2011 48.9132604633526 2012 49.63413664349668 2013 50.7529539203581 2014 51.614145239773826 2015 53.14667099704356 2016 54.44279879223488 2017 54.595268177226544 2018 54.39026409300487 2019 55.2998071316694 2020 55.4745484431048 2021 53.9230883468954 2022 53.629250374228796 2023 55.119980782098956