Year US Dollars 1970 247327000 1971 270908000 1972 268461000 1973 301153000 1974 349030000 1975 356082000 1976 373792000 1977 471755000 1978 564050000 1979 567286000 1980 727064000 1981 830266000 1982 875178000 1983 988421000 1984 1237312000 1985 1456138000 1986 1743109000 1987 2049083000 1988 2019875000 1989 2127519000 1990 2468005000 1991 2599268000 1992 2900466000 1993 2903222000 1994 2694524000 1995 2958177000 1996 3006608000 1997 3152287000 1998 3204823000 1999 3217983000 2000 2981178000 2001 2878082000 2002 2792059000 2003 3076153000 2004 3289524000 2005 3195563000 2006 1603838000 2007 1850254000 2008 2055382000 2009 2210303000 2010 2455770000 2011 2921941000 2012 3059194000 2013 3445668000 2014 3456289000 2015 3688693000 2016 3787945000