| Year |
Month |
Pounds (x1000) |
| 1989 |
December |
83.56 |
|
November |
94.74 |
|
October |
141.66 |
|
September |
111.94 |
|
August |
119.04 |
|
July |
90.86 |
|
June |
102.05 |
|
May |
89.00 |
|
April |
62.64 |
|
March |
53.42 |
|
February |
49.91 |
| 1989 |
January |
52.99 |
| 1988 |
December |
50.34 |
|
November |
58.93 |
|
October |
91.63 |
|
September |
77.42 |
|
August |
79.61 |
|
July |
68.15 |
|
June |
35.79 |
|
May |
20.93 |
|
April |
19.62 |
|
March |
25.06 |
|
February |
27.53 |
| 1988 |
January |
27.28 |
| 1987 |
December |
16.58 |
|
November |
40.13 |
|
October |
72.63 |
|
September |
65.54 |
|
August |
63.84 |
|
July |
59.91 |
|
June |
59.20 |
|
May |
39.30 |
|
April |
34.14 |
|
March |
39.23 |
|
February |
19.69 |
| 1987 |
January |
18.03 |
| 1986 |
December |
25.57 |
|
November |
43.81 |
|
October |
32.47 |
|
September |
39.99 |
|
August |
73.79 |
|
July |
51.47 |
|
June |
54.72 |
|
May |
40.37 |
|
April |
22.54 |
|
March |
34.23 |
|
February |
20.09 |
| 1986 |
January |
21.82 |
| 1985 |
December |
22.34 |
|
November |
7.15 |
|
October |
19.94 |
|
September |
36.49 |
|
August |
33.70 |
|
July |
29.52 |
|
June |
22.34 |
|
May |
25.19 |
|
April |
37.75 |
|
March |
44.73 |
|
February |
17.03 |
| 1985 |
January |
3.91 |
| 1984 |
December |
12.10 |
|
November |
22.82 |
|
October |
28.28 |
|
September |
44.78 |
|
August |
62.83 |
|
July |
40.77 |
|
June |
16.70 |
|
May |
14.54 |
|
April |
17.17 |
|
March |
17.83 |
|
February |
12.92 |
| 1984 |
January |
10.81 |
| 1983 |
December |
15.80 |
|
November |
24.90 |
|
October |
36.38 |
|
September |
38.01 |
|
August |
47.40 |
|
July |
38.23 |
|
June |
39.99 |
|
May |
23.23 |
|
April |
15.67 |
|
March |
11.96 |
|
February |
5.16 |
| 1983 |
January |
16.07 |
| 1982 |
December |
17.14 |
|
November |
29.15 |
|
October |
29.61 |
|
September |
46.53 |
|
August |
47.52 |
|
July |
47.79 |
|
June |
52.95 |
|
May |
39.13 |
|
April |
23.45 |
|
March |
20.29 |
|
February |
20.55 |
| 1982 |
January |
22.03 |
| 1981 |
December |
25.36 |
|
November |
19.17 |
|
October |
28.09 |
|
September |
38.26 |
|
August |
68.00 |
|
July |
61.50 |
|
June |
56.18 |
|
May |
26.10 |
|
April |
25.06 |
|
March |
22.83 |
|
February |
25.26 |
| 1981 |
January |
23.47 |
| 1980 |
December |
24.43 |
|
November |
35.36 |
|
October |
22.94 |
|
September |
28.14 |
|
August |
61.21 |
|
July |
61.86 |
|
June |
46.66 |
|
May |
34.70 |
|
April |
24.96 |
|
March |
12.22 |
|
February |
18.40 |
| 1980 |
January |
12.87 |
| 1979 |
December |
13.78 |
|
November |
11.76 |
|
October |
19.10 |
|
September |
36.87 |
|
August |
50.17 |
|
July |
50.44 |
|
June |
43.99 |
|
May |
48.15 |
|
April |
29.65 |
|
March |
29.46 |
|
February |
8.72 |
| 1979 |
January |
9.05 |
| 1978 |
December |
14.39 |
|
November |
20.84 |
|
October |
15.99 |
|
September |
45.76 |
|
August |
53.43 |
|
July |
81.17 |
|
June |
92.26 |
|
May |
39.48 |
|
April |
22.62 |
|
March |
11.42 |
|
February |
14.14 |
| 1978 |
January |
17.30 |
| 1977 |
December |
14.20 |
|
November |
19.04 |
|
October |
16.79 |
|
September |
30.10 |
|
August |
57.79 |
|
July |
32.02 |
|
June |
21.41 |
|
May |
16.70 |
|
April |
13.04 |
|
March |
14.16 |
|
February |
23.72 |
| 1977 |
January |
14.51 |
| 1976 |
December |
22.37 |
|
November |
15.33 |
|
October |
22.81 |
|
September |
18.08 |
|
August |
19.01 |
|
July |
14.55 |
|
June |
6.96 |
|
May |
2.90 |
|
April |
1.55 |
|
March |
1.09 |
|
February |
2.85 |
| 1976 |
January |
3.97 |
| 1975 |
December |
3.38 |
|
November |
3.31 |
|
October |
7.06 |
|
September |
4.85 |
|
August |
10.91 |
|
July |
4.33 |
|
June |
7.83 |
|
May |
8.37 |
|
April |
2.66 |
|
March |
6.38 |
|
February |
7.54 |
| 1975 |
January |
6.16 |
| 1974 |
December |
3.48 |
|
November |
9.34 |
|
October |
7.74 |
|
September |
8.75 |
|
August |
15.43 |
|
July |
13.82 |
|
June |
5.40 |
|
May |
3.05 |
|
April |
2.90 |
|
March |
1.85 |
|
February |
2.16 |
| 1974 |
January |
2.82 |
| 1973 |
December |
2.54 |
|
November |
4.29 |
|
October |
6.08 |
|
September |
6.99 |
|
August |
7.51 |
|
July |
3.66 |
|
June |
0.60 |
|
May |
0.79 |
|
April |
0.24 |
|
March |
0.49 |
|
February |
0.20 |
| 1973 |
January |
0.00 |
| 1972 |
December |
0.00 |
|
November |
0.00 |
|
October |
0.35 |
|
September |
0.17 |
|
August |
0.00 |
|
July |
0.00 |
|
June |
0.61 |
|
May |
0.31 |
|
April |
0.53 |
|
March |
0.15 |
|
February |
0.26 |
| 1972 |
January |
0.62 |
| 1971 |
December |
0.71 |
|
November |
0.00 |
|
October |
0.30 |
|
September |
0.00 |
|
August |
0.96 |
|
July |
5.34 |
|
June |
1.73 |
|
May |
3.68 |
|
April |
12.63 |
|
March |
7.36 |
|
February |
10.84 |
| 1971 |
January |
3.42 |
| 1970 |
December |
10.33 |
|
November |
17.60 |
|
October |
23.98 |
|
September |
27.94 |
|
August |
29.10 |
|
July |
39.53 |
|
June |
10.42 |
|
May |
6.65 |
|
April |
3.25 |
|
March |
2.88 |
|
February |
1.63 |
| 1970 |
January |
0.40 |
| 1969 |
December |
5.31 |
|
November |
6.73 |
|
October |
13.03 |
|
September |
15.82 |
|
August |
26.81 |
|
July |
32.61 |
|
June |
16.05 |
|
May |
6.37 |
|
April |
2.52 |
|
March |
3.10 |
|
February |
4.89 |
| 1969 |
January |
1.06 |
|