Year current US$ 1977 230000.004172325 1980 259999.990463257 1981 439999.997615814 1982 379999.99523162795 1983 460000.00834465 1984 509999.99046325695 1985 639999.985694885 1986 579999.983310699 1987 460000.00834465 1988 660000.026226044 1989 779999.971389771 1990 720000.028610229 1991 1639999.98569489 1992 610000.014305115 1993 720000.028610229 1994 560000.002384186 1995 660000.026226044 1996 730000.019073486 1997 1490000.0095367401 1998 860000.014305115 1999 1740000.0095367401 2000 720000.028610229 2001 1559999.9427795399 2002 1720000.02861023 2003 1950000.04768372 2004 810000.002384186 2005 839999.973773956 2006 779999.971389771 2007 2049999.9523162802 2008 2869999.8855590797 2009 2990000.00953674 2010 2690000.05722046 2011 2779999.97138977 2012 4218105.79299927 2013 3361546.0395813 2014 2455526.59034729 2015 2322877.1686554 2016 2123811.72180176 2017 1532213.6878967301 2018 1365650.05779266 2019 1921577.93045044 2020 2212059.97467041 2021 1713931.56051636 2022 3704010.0097656297