Year current US$ 1998 560000.002384186 1999 680000.007152557 2000 479999.989271164 2001 810000.002384186 2002 980000.019073486 2003 870000.004768372 2004 1320000.05245209 2005 839999.973773956 2006 769999.980926514 2007 709999.978542328 2008 469999.998807907 2009 19999.9995529652 2015 50000.0007450581 2020 219999.998807907 2021 219999.998807907 2022 419999.986886978