Year Pounds Dollars

2002 22.0 4.3
2001 24.7 6.4
2000 28.3 8.2
1999 35.8 3.9
1998 39.0 6.4
1997 68.3 7.3
1996 52.7 6.0
1995 44.5 5.6
1994 33.8 3.2
1993 31.9 3.1
1992 39.9 3.5
1991 31.8 3.6
1990 36.2 3.1
1989 24.8 7.0
1988 40.6 6.7
1987 38.7 8.1
1986 43.4 9.1
1985 58.6 11.1
1984 42.9 9.4
1983 54.6 12.3
1982 50.1 10.7
1981 44.0 13.4