Year US Dollars 1970 4879000 1971 1998000 1972 3384000 1973 7914000 1974 12311000 1975 24074000 1976 47677000 1977 87493000 1978 126804000 1979 156077000 1980 189831000 1981 196580000 1982 218308000 1983 240501000 1984 290096000 1985 365596000 1986 451267000 1987 605109000 1988 653567000 1989 623297000 1990 711731000 1991 809898000 1992 857064000 1993 908962000 1994 955148000 1995 1032504000 1996 1045353000 1997 1112852000 1998 1227858000 1999 1311799000 2000 1289759000 2001 1299043000 2002 1452035000 2003 1555053000 2004 1670720000 2005 1526467000 2006 433569000 2007 619217000 2008 688908000 2009 861367000 2010 906314000 2011 1215707000 2012 1262534000 2013 1693564000 2014 2021860000 2015 2240624000 2016 2783188000