Year % of GDP 1990 0.361159872570054 1991 2.4436986909252276 1992 6.99242244849633 1993 8.377473238684226 1994 1.9315407844059094 1995 0.7627326585629651 1996 5.300057397677602 1997 2.1769591502344765 1998 0.7695166333487108 1999 5.756756756756757 2000 3.487951683477475 2001 4.114608081721382 2002 2.7179700570546093 2014 5.9600102739724825 2015 4.326260145056894 2016 6.063824357525101 2017 2.225845780960562 2018 4.126955215589843 2019 4.040943196165634 2020 7.879172791856027 2021 8.68264494788435 2022 4.940747339188505