Year current US$ 1965 29999.999329447703 1966 59999.9986588955 1967 70000.0002980232 1968 90000.0035762787 1969 119999.997317791 1970 140000.000596046 1971 170000.00178813902 1972 259999.990463257 1973 370000.00476837205 1974 479999.989271164 1975 740000.009536743 1976 949999.988079071 1977 930000.007152557 1978 1720000.02861023 1979 1039999.96185303 1980 400000.00596046395 1981 1230000.01907349 1982 1370000.00476837 1983 2160000.08583069 1984 1870000.00476837 1985 2269999.98092651 1986 2490000.00953674 1987 4639999.8664856 1988 8430000.30517578 1989 6619999.88555908 1990 5170000.07629395 1991 7730000.01907349 1992 7130000.11444092 1993 8229999.54223633 1994 7269999.98092651 1995 6449999.80926514 1996 7059999.94277954 1997 9890000.34332275 1998 6519999.98092651 1999 6750000 2000 5840000.15258789 2001 7130000.11444092 2002 7789999.96185303 2003 10109999.6566772 2004 14149999.6185303 2005 12760000.2288818 2006 12010000.2288818 2007 14470000.2670288 2008 13180000.3051758 2009 16229999.5422363 2010 14939999.5803833 2011 13649999.6185303 2012 17379999.1607666 2013 20860000.6103516 2014 30989999.7711182 2015 25299999.237060502 2016 25940000.5340576 2017 26459999.084472697 2018 31370000.8392334 2019 27889999.3896484 2020 28540000.915527303 2021 29399999.6185303 2022 30719999.3133545