Year US Dollars 1970 77085000 1971 84418000 1972 101114000 1973 124167000 1974 174786000 1975 229024000 1976 294331000 1977 400783000 1978 525948000 1979 576840000 1980 659779000 1981 1055885000 1982 1221705000 1983 1410243000 1984 1498092000 1985 1639302000 1986 1799721000 1987 2009222000 1988 2086078000 1989 2159231000 1990 2370267000 1991 2449291000 1992 2446604000 1993 2500548000 1994 2616163000 1995 2678444000 1996 2643161000 1997 2561329000 1998 2635038000 1999 2624763000 2000 2579365000 2001 2580042000 2002 2707489000 2003 2858326000 2004 2869955000 2005 2770027000 2006 2858378000 2007 2965273000 2008 2969848000 2009 3045613000 2010 3045469000 2011 3053270000 2012 3054629000 2013 3055515000 2014 2953245000 2015 2891647000 2016 2649210000