Year % of GDP 1991 2.730390038905751 1992 2.5589547590402475 1993 2.3334474467250725 1994 2.374133830660321 1995 2.3394369582456545 1996 2.3807597626884167 1997 2.341007017181356 1998 2.2510921548185134 1999 2.141296283766537 2000 2.0942647933607135 2001 2.0913192300049137 2002 1.963854545912656 2003 1.8991832305099967 2004 1.8742725450754762 2005 1.6647339968848072 2006 1.5596752773433114 2007 1.594559645014135 2008 1.539386409692397 2009 1.4120293716846568 2010 1.5402302469095612 2011 1.5735346850461542 2012 1.5718573880623958 2013 1.610887563135726 2014 1.5826468113241905 2015 1.5444236533412294 2016 1.4922219706078965 2017 1.5815543395353122 2018 1.5180482040208632 2019 1.4840786042163447 2020 1.5214955704605881 2021 1.4954382753982445 2022 1.5924646026925913 2023 1.5411816861763687