Year current US$ 1988 109999.999403954 1990 50000.0007450581 1993 100000.00149011599 1994 70000.0002980232 1995 230000.004172325 1996 300000.011920929 1997 550000.011920929 1998 310000.002384186 1999 419999.986886978 2000 540000.021457672 2001 4599999.90463257 2002 6570000.17166138 2003 5250000 2004 4550000.19073486 2005 3130000.1144409203 2006 4590000.15258789 2007 7400000.09536743 2008 6309999.94277954 2009 7110000.1335144 2010 9119999.88555908 2011 9100000.38146973 2012 7179999.82833862 2013 4860000.1335144 2014 3359999.89509583 2015 2759999.99046326 2016 2619999.8855590797 2017 1690000.0572204601 2018 2329999.92370605 2019 1860000.01430511 2020 3170000.07629395 2021 7610000.1335144 2022 5989999.771118159