Year % of GDP 1993 39.423967856941076 1994 36.255749630295355 1995 34.191581755451175 1996 35.98106942233129 1997 35.08776269519426 1998 34.804031743579145 1999 35.44184751179958 2000 37.14425754827324 2001 38.39258368664821 2002 39.31710715111817 2003 38.1987809106515 2004 39.2879714972278 2005 39.077613357891906 2006 38.71713410016157 2007 38.50616496236696 2008 38.84161754237234 2009 38.7897872396311 2010 38.305410451541704 2011 37.50395576404431 2012 37.77000542222812 2013 38.50756446460815 2014 39.703851599963244 2015 39.83267342417531 2016 39.88598081489372 2017 39.72190634572969 2018 39.49206625910279 2019 38.84825034777759 2020 36.601043946604214 2021 34.178068160027244 2022 33.85305144620324 2023 33.44049560532071