Year % of GDP 1997 60.2349838714921 1998 57.87781611826139 1999 48.00031067047959 2000 36.956969405932874 2001 25.919596515687292 2002 29.98561733394473 2003 34.19162105175677 2004 36.3877505192398 2005 42.07400847214337 2006 42.55303032767041 2007 49.2611284876516 2008 53.11423776586983 2009 52.794419944506046 2010 52.78321549081073 2011 53.126635691412794 2012 54.709807298405146 2013 54.850416117195 2014 54.65802358361952 2015 52.982750351914056 2016 52.533163192395996 2017 53.590945204164406 2018 52.915723016212766 2019 53.361630760299626 2020 53.432363598437185 2021 49.2742520380268 2022 44.33535115068112 2023 44.28206325242038