| Year |
Month |
Pounds (x1000) |
| 1989 |
December |
51.63 |
|
November |
77.73 |
|
October |
42.45 |
|
September |
49.20 |
|
August |
83.84 |
|
July |
50.75 |
|
June |
51.44 |
|
May |
58.31 |
|
April |
50.79 |
|
March |
36.64 |
|
February |
59.06 |
| 1989 |
January |
42.29 |
| 1988 |
December |
19.29 |
|
November |
22.12 |
|
October |
9.42 |
|
September |
15.86 |
|
August |
21.22 |
|
July |
7.51 |
|
June |
48.81 |
|
May |
60.94 |
|
April |
24.53 |
|
March |
52.77 |
|
February |
32.34 |
| 1988 |
January |
9.45 |
| 1987 |
December |
5.58 |
|
November |
4.59 |
|
October |
9.82 |
|
September |
8.54 |
|
August |
8.15 |
|
July |
16.54 |
|
June |
29.94 |
|
May |
34.01 |
|
April |
13.83 |
|
March |
14.07 |
|
February |
8.45 |
| 1987 |
January |
10.80 |
| 1986 |
December |
13.02 |
|
November |
3.25 |
|
October |
6.13 |
|
September |
13.07 |
|
August |
20.23 |
|
July |
25.67 |
|
June |
21.50 |
|
May |
28.09 |
|
April |
41.03 |
|
March |
15.79 |
|
February |
16.03 |
| 1986 |
January |
8.20 |
| 1985 |
December |
21.45 |
|
November |
8.26 |
|
October |
12.07 |
|
September |
9.11 |
|
August |
17.54 |
|
July |
24.60 |
|
June |
32.05 |
|
May |
26.65 |
|
April |
18.72 |
|
March |
17.66 |
|
February |
17.67 |
| 1985 |
January |
19.52 |
| 1984 |
December |
20.97 |
|
November |
10.42 |
|
October |
14.41 |
|
September |
22.76 |
|
August |
16.43 |
|
July |
40.50 |
|
June |
38.26 |
|
May |
39.24 |
|
April |
46.83 |
|
March |
120.02 |
|
February |
63.18 |
| 1984 |
January |
100.69 |
| 1983 |
December |
32.11 |
|
November |
44.29 |
|
October |
16.79 |
|
September |
34.71 |
|
August |
60.81 |
|
July |
52.99 |
|
June |
37.18 |
|
May |
84.48 |
|
April |
47.05 |
|
March |
62.53 |
|
February |
38.17 |
| 1983 |
January |
52.84 |
| 1982 |
December |
52.73 |
|
November |
55.20 |
|
October |
17.78 |
|
September |
12.60 |
|
August |
12.09 |
|
July |
37.66 |
|
June |
53.25 |
|
May |
46.89 |
|
April |
24.00 |
|
March |
27.09 |
|
February |
24.12 |
| 1982 |
January |
20.17 |
| 1981 |
December |
20.23 |
|
November |
21.99 |
|
October |
9.30 |
|
September |
21.96 |
|
August |
19.54 |
|
July |
36.40 |
|
June |
43.67 |
|
May |
39.46 |
|
April |
44.85 |
|
March |
28.55 |
|
February |
25.35 |
| 1981 |
January |
29.44 |
| 1980 |
December |
32.03 |
|
November |
38.87 |
|
October |
15.07 |
|
September |
12.01 |
|
August |
17.66 |
|
July |
22.08 |
|
June |
34.87 |
|
May |
60.05 |
|
April |
32.95 |
|
March |
57.41 |
|
February |
97.35 |
| 1980 |
January |
52.44 |
| 1979 |
December |
45.67 |
|
November |
35.04 |
|
October |
14.44 |
|
September |
9.01 |
|
August |
13.43 |
|
July |
48.10 |
|
June |
28.54 |
|
May |
83.02 |
|
April |
68.74 |
|
March |
33.97 |
|
February |
14.45 |
| 1979 |
January |
16.62 |
| 1978 |
December |
36.14 |
|
November |
15.84 |
|
October |
10.88 |
|
September |
13.33 |
|
August |
20.75 |
|
July |
17.42 |
|
June |
31.30 |
|
May |
42.96 |
|
April |
41.23 |
|
March |
59.82 |
|
February |
46.31 |
| 1978 |
January |
25.85 |
| 1977 |
December |
32.39 |
|
November |
40.60 |
|
October |
17.68 |
|
September |
24.66 |
|
August |
48.46 |
|
July |
42.01 |
|
June |
60.98 |
|
May |
111.08 |
|
April |
124.18 |
|
March |
87.15 |
|
February |
46.14 |
| 1977 |
January |
36.88 |
| 1976 |
December |
48.37 |
|
November |
62.62 |
|
October |
33.96 |
|
September |
59.51 |
|
August |
86.46 |
|
July |
79.58 |
|
June |
133.65 |
|
May |
83.31 |
|
April |
113.62 |
|
March |
96.98 |
|
February |
67.86 |
| 1976 |
January |
47.31 |
| 1975 |
December |
17.41 |
|
November |
12.28 |
|
October |
13.74 |
|
September |
40.03 |
|
August |
36.98 |
|
July |
42.92 |
|
June |
36.00 |
|
May |
81.80 |
|
April |
54.47 |
|
March |
27.74 |
|
February |
42.26 |
| 1975 |
January |
38.18 |
| 1974 |
December |
30.10 |
|
November |
44.21 |
|
October |
16.81 |
|
September |
31.14 |
|
August |
55.58 |
|
July |
38.71 |
|
June |
56.64 |
|
May |
64.12 |
|
April |
44.55 |
|
March |
50.78 |
|
February |
54.92 |
| 1974 |
January |
50.25 |
| 1973 |
December |
70.57 |
|
November |
50.51 |
|
October |
29.28 |
|
September |
12.55 |
|
August |
47.93 |
|
July |
38.18 |
|
June |
69.41 |
|
May |
84.10 |
|
April |
61.99 |
|
March |
54.79 |
|
February |
71.96 |
| 1973 |
January |
53.28 |
| 1972 |
December |
66.88 |
|
November |
67.87 |
|
October |
29.47 |
|
September |
51.87 |
|
August |
53.28 |
|
July |
76.03 |
|
June |
74.50 |
|
May |
87.16 |
|
April |
83.13 |
|
March |
79.77 |
|
February |
70.82 |
| 1972 |
January |
56.55 |
| 1971 |
December |
41.01 |
|
November |
77.50 |
|
October |
27.29 |
|
September |
21.51 |
|
August |
51.97 |
|
July |
70.45 |
|
June |
87.23 |
|
May |
102.63 |
|
April |
76.08 |
|
March |
76.13 |
|
February |
60.98 |
| 1971 |
January |
44.62 |
| 1970 |
December |
42.18 |
|
November |
56.28 |
|
October |
17.62 |
|
September |
51.95 |
|
August |
68.76 |
|
July |
90.58 |
|
June |
96.50 |
|
May |
117.47 |
|
April |
108.83 |
|
March |
65.56 |
|
February |
107.87 |
| 1970 |
January |
68.89 |
| 1969 |
December |
52.62 |
|
November |
80.31 |
|
October |
37.71 |
|
September |
49.03 |
|
August |
41.49 |
|
July |
53.07 |
|
June |
79.96 |
|
May |
76.82 |
|
April |
65.87 |
|
March |
102.66 |
|
February |
53.19 |
| 1969 |
January |
51.33 |
|