Year current US$ 1977 -407034.058131147 1978 11078817.09785866 1979 -9872056.084711343 1980 473306.5629563637 1981 4784135.165979479 1982 2130209.007313078 1983 8922338.069509821 1984 1144278.2291825707 1985 25808938.094013326 1986 -955802.359061138 1987 -2695179.56354342 1988 8359962.69630204 1989 15961967.183806712 1990 12899207.517058725 1991 6490447.208437565 1992 3762866.8369671186 1993 9192598.856786087 1994 -1948830.7786215122 1995 11880233.796429923 1996 5835179.005991624 1997 21020462.248959675 1998 26725913.31723682 1999 0 2000 0 2001 0 2002 0 2003 0 2004 0 2005 0 2006 0 2007 0 2009 5838907.936418239 2010 15155794.187443508 2011 7193654.926433674 2012 1615884.3571147677 2013 19714532.117157474 2014 15819511.985776493 2015 20902834.030188628 2016 28941676.497614693 2017 28250769.495058827 2018 213258861.75693282 2019 257934625.30461088 2020 179186127.8837035 2021 242617625.07547486 2022 223832484.97164458 2023 233901883.6023321