Year US Dollars adjusted for inflation) 1995 1000000 1996 25000000 1997 6000000 1998 0 1999 1000000 2000 13000000 2001 57000000 2002 42000000 2003 94000000 2004 6000000 2005 592000000 2006 46000000 2007 10000000 2008 25000000 2009 6000000 2010 13000000 2011 71000000 2012 22000000 2013 15000000 2015 0 2018 7000000 2019 1000000 2020 9000000 2021 33000000 2022 69000000