Year Percent of GDP (Units) 2000 87.437 2001 73.702 2002 62.339 2003 55.643 2004 51.328 2005 42.612 2006 35.848 2007 38.121 2008 30.252 2009 26.483 2010 26.363 2011 23.106 2012 22.955 2013 24.884 2014 24.682 2015 27.013 2016 27.955 2017 29.396 2018 30.423 2019 30.563 2020 39.747 2021 41.140 2022 40.141 2023 39.894 2024 39.313 2025 39.341 2026 39.292 2027 39.179 2028 38.994 2029 38.741