Year Percent of GDP (Units) 1996 33.685 1997 30.559 1998 40.691 1999 38.984 2000 38.850 2001 39.644 2002 41.438 2003 40.566 2004 41.002 2005 37.321 2006 33.037 2007 26.975 2008 24.007 2009 26.026 2010 28.090 2011 29.513 2012 33.741 2013 35.076 2014 37.436 2015 39.786 2016 44.056 2017 47.064 2018 51.839 2019 56.431 2020 66.912 2021 67.628 2022 62.985 2023 61.119 2024 60.598 2025 59.636 2026 58.556 2027 57.246 2028 55.882 2029 54.418