Year Percent of GDP (Units) 1995 44.695 1996 44.916 1997 46.810 1998 46.899 1999 44.989 2000 43.526 2001 43.762 2002 43.792 2003 43.612 2004 42.283 2005 43.233 2006 41.306 2007 41.745 2008 41.294 2009 42.483 2010 41.699 2011 42.154 2012 42.318 2013 42.080 2014 41.944 2015 41.669 2016 41.935 2017 42.644 2018 45.276 2019 45.327 2020 43.517 2021 43.436 2022 43.599 2023 46.399 2024 47.040 2025 47.822 2026 47.863 2027 48.151 2028 48.364 2029 48.687