Year Percent of GDP (Units) 1996 15.193 1997 40.455 1998 49.881 1999 56.585 2000 57.826 2001 57.469 2002 54.902 2003 47.501 2004 46.266 2005 45.462 2006 39.177 2007 35.985 2008 34.947 2009 42.364 2010 39.831 2011 39.116 2012 41.930 2013 42.190 2014 43.335 2015 42.559 2016 41.745 2017 41.778 2018 41.941 2019 41.063 2020 49.420 2021 58.337 2022 60.522 2023 62.440 2024 64.510 2025 65.529 2026 65.760 2027 65.144 2028 64.578 2029 64.369