Year current US$ 1960 0 1961 0 1966 0 1967 0 1987 0 1988 0 1989 0 1990 0 1991 0 1992 219999.998807907 1993 530000.001192093 1994 549999.997019768 1995 740000.002086163 1996 1069999.98353422 1997 410000.002011657 1998 1440000.02369285 1999 1080000.01497567 2000 640000.004321337 2001 1900000.03017485 2002 2109999.9751895703 2003 470000.006258488 2004 1879999.98219311 2005 2039999.99538064 2006 2380000.0399351097 2007 4559999.94836748 2008 3889999.98942018 2009 3049999.96721745 2010 9760000.3965199 2011 10309999.9818951 2012 7899999.75636601 2013 6860000.00871718 2014 5440000.03486872 2015 4849999.92139637 2016 4209999.89658594 2017 5839999.98308718 2018 6359999.85970557 2019 6780000.07010996 2020 10430000.0295043 2021 11059999.499470001 2022 14549999.736249475