Year current US$ 1995 19999.9995529652 1996 29999.999329447703 1997 39999.9991059303 1998 19999.9995529652 2000 9999.99977648258 2002 9999.99977648258 2004 19999.9995529652 2006 19999.9995529652 2008 109999.999403954 2009 170000.00178813902 2010 1009999.99046326 2011 689999.997615814 2012 319999.99284744303 2013 109999.999403954 2014 29999.999329447703 2015 300000.011920929 2016 140000.000596046 2017 409999.99642372096 2018 1320000.05245209 2019 3970000.02861023 2020 1450000.04768372 2021 1250000 2022 660000.026226044