Year % of GDP 1995 50.67115571976311 1996 51.14688612551374 1997 51.619816916295555 1998 52.72723263378965 1999 53.891097765647956 2000 55.17960326615423 2001 55.6093782417385 2002 56.314954789406734 2003 55.968762044947326 2004 54.6394016721509 2005 54.985233525832314 2006 54.83691435174754 2007 54.71006836937185 2008 54.794878509347555 2009 56.15568011665787 2010 55.400443666624774 2011 54.00495305317897 2012 55.282812234875024 2013 56.110978820005506 2014 55.48328501178538 2015 55.43604787375268 2016 56.00900265373602 2017 56.77480589663957 2018 57.25318684912777 2019 57.799462564935645 2020 58.502048883528005 2021 58.329381727446695 2022 58.73406241186575 2023 59.22628931927403