Year current US$ 1972 109999.99754130846 1973 159999.99828636646 1974 250000.0018626452 1975 1219999.9839067506 1976 640000.0024586915 1977 479999.99299645476 1978 870000.0066310163 1979 870000.0084936619 1980 1320000.020787122 1981 1100000.0089406965 1982 190000.00320374966 1983 139999.99687075618 1984 149999.99664723867 1985 129999.99895691875 1986 229999.99672174454 1987 479999.9911338089 1988 679999.9903887503 1989 780000.0011920918 1990 1109999.9826401467 1991 830000.0131130214 1992 620000.0084936611 1993 1379999.9840557578 1994 3639999.9707937194 1995 3339999.9756366014 1996 3579999.9609589553 1997 4970000.009983772 1998 3659999.9908357854 1999 4800000.049173829 2000 4740000.024437903 2001 4940000.038594007 2002 6019999.990239737 2003 10950000.073760748 2004 12229999.84212219 2005 16130000.127479432 2006 9179999.962449066 2007 8960000.049322845 2008 12049999.976530667 2009 7960000.060498712 2010 8290000.125765803 2011 10740000.076591963 2012 4889999.996870756 2013 3909999.9312311364 2014 6879999.978467823 2015 5719999.965280294 2016 5119999.973103404 2017 13419999.871402973 2018 9150000.028312206 2019 10729999.823495746 2020 7920000.035315748 2021 10739999.82886016 2022 6439999.938011168