| Year |
Month |
Pounds (x1000) |
| 1989 |
December |
29.18 |
|
November |
53.90 |
|
October |
44.02 |
|
September |
23.49 |
|
August |
13.97 |
|
July |
15.23 |
|
June |
22.42 |
|
May |
66.87 |
|
April |
109.19 |
|
March |
57.78 |
|
February |
22.16 |
| 1989 |
January |
16.79 |
| 1988 |
December |
12.02 |
|
November |
26.06 |
|
October |
22.12 |
|
September |
10.05 |
|
August |
8.40 |
|
July |
8.56 |
|
June |
11.66 |
|
May |
32.72 |
|
April |
51.03 |
|
March |
41.33 |
|
February |
40.63 |
| 1988 |
January |
20.68 |
| 1987 |
December |
39.55 |
|
November |
46.75 |
|
October |
47.32 |
|
September |
8.93 |
|
August |
6.79 |
|
July |
8.82 |
|
June |
31.63 |
|
May |
69.82 |
|
April |
81.86 |
|
March |
152.61 |
|
February |
105.40 |
| 1987 |
January |
46.32 |
| 1986 |
December |
50.06 |
|
November |
35.81 |
|
October |
35.87 |
|
September |
16.67 |
|
August |
27.98 |
|
July |
22.42 |
|
June |
14.12 |
|
May |
28.65 |
|
April |
41.70 |
|
March |
68.47 |
|
February |
36.20 |
| 1986 |
January |
21.06 |
| 1985 |
December |
16.67 |
|
November |
27.03 |
|
October |
35.21 |
|
September |
34.76 |
|
August |
33.95 |
|
July |
18.56 |
|
June |
17.20 |
|
May |
24.53 |
|
April |
41.14 |
|
March |
45.01 |
|
February |
23.30 |
| 1985 |
January |
21.57 |
| 1984 |
December |
24.91 |
|
November |
33.48 |
|
October |
18.15 |
|
September |
10.45 |
|
August |
9.11 |
|
July |
6.09 |
|
June |
11.50 |
|
May |
23.98 |
|
April |
27.48 |
|
March |
30.41 |
|
February |
26.61 |
| 1984 |
January |
13.45 |
| 1983 |
December |
23.60 |
|
November |
37.60 |
|
October |
25.37 |
|
September |
13.45 |
|
August |
9.52 |
|
July |
11.45 |
|
June |
14.34 |
|
May |
23.37 |
|
April |
21.12 |
|
March |
20.11 |
|
February |
14.51 |
| 1983 |
January |
5.56 |
| 1982 |
December |
12.62 |
|
November |
16.26 |
|
October |
20.94 |
|
September |
14.94 |
|
August |
8.73 |
|
July |
8.30 |
|
June |
9.05 |
|
May |
26.34 |
|
April |
20.71 |
|
March |
32.19 |
|
February |
11.83 |
| 1982 |
January |
9.83 |
| 1981 |
December |
12.87 |
|
November |
22.44 |
|
October |
28.33 |
|
September |
15.12 |
|
August |
11.79 |
|
July |
9.63 |
|
June |
10.23 |
|
May |
15.52 |
|
April |
29.67 |
|
March |
32.74 |
|
February |
11.31 |
| 1981 |
January |
8.89 |
| 1980 |
December |
14.84 |
|
November |
19.19 |
|
October |
19.72 |
|
September |
8.82 |
|
August |
8.95 |
|
July |
9.11 |
|
June |
17.07 |
|
May |
30.42 |
|
April |
34.36 |
|
March |
22.90 |
|
February |
14.16 |
| 1980 |
January |
11.22 |
| 1979 |
December |
7.97 |
|
November |
12.50 |
|
October |
19.01 |
|
September |
15.64 |
|
August |
13.80 |
|
July |
8.78 |
|
June |
8.86 |
|
May |
16.74 |
|
April |
24.59 |
|
March |
14.51 |
|
February |
4.40 |
| 1979 |
January |
3.84 |
| 1978 |
December |
2.42 |
|
November |
15.68 |
|
October |
17.61 |
|
September |
10.57 |
|
August |
9.25 |
|
July |
7.66 |
|
June |
6.15 |
|
May |
13.14 |
|
April |
13.92 |
|
March |
5.77 |
|
February |
4.00 |
| 1978 |
January |
3.96 |
| 1977 |
December |
6.39 |
|
November |
13.82 |
|
October |
13.86 |
|
September |
11.55 |
|
August |
9.97 |
|
July |
6.78 |
|
June |
6.71 |
|
May |
14.29 |
|
April |
22.74 |
|
March |
5.93 |
|
February |
4.78 |
| 1977 |
January |
8.23 |
| 1976 |
December |
9.57 |
|
November |
12.81 |
|
October |
17.04 |
|
September |
13.60 |
|
August |
3.88 |
|
July |
3.59 |
|
June |
4.28 |
|
May |
9.16 |
|
April |
15.08 |
|
March |
11.96 |
|
February |
5.98 |
| 1976 |
January |
4.42 |
| 1975 |
December |
6.62 |
|
November |
7.41 |
|
October |
9.75 |
|
September |
7.62 |
|
August |
5.37 |
|
July |
3.52 |
|
June |
5.85 |
|
May |
8.93 |
|
April |
7.65 |
|
March |
9.91 |
|
February |
8.89 |
| 1975 |
January |
3.39 |
| 1974 |
December |
7.31 |
|
November |
7.62 |
|
October |
10.70 |
|
September |
6.38 |
|
August |
6.92 |
|
July |
8.05 |
|
June |
4.19 |
|
May |
9.81 |
|
April |
10.27 |
|
March |
8.68 |
|
February |
4.37 |
| 1974 |
January |
3.82 |
| 1973 |
December |
10.07 |
|
November |
6.99 |
|
October |
10.15 |
|
September |
7.52 |
|
August |
5.95 |
|
July |
6.25 |
|
June |
9.82 |
|
May |
9.76 |
|
April |
12.14 |
|
March |
4.56 |
|
February |
3.36 |
| 1973 |
January |
1.83 |
| 1972 |
December |
3.28 |
|
November |
7.67 |
|
October |
9.45 |
|
September |
4.86 |
|
August |
8.55 |
|
July |
9.13 |
|
June |
8.40 |
|
May |
18.28 |
|
April |
40.74 |
|
March |
18.33 |
|
February |
6.60 |
| 1972 |
January |
3.22 |
| 1971 |
December |
7.36 |
|
November |
12.05 |
|
October |
12.36 |
|
September |
9.17 |
|
August |
5.79 |
|
July |
9.43 |
|
June |
6.05 |
|
May |
9.14 |
|
April |
10.19 |
|
March |
2.72 |
|
February |
4.73 |
| 1971 |
January |
1.76 |
| 1970 |
December |
4.19 |
|
November |
6.59 |
|
October |
6.96 |
|
September |
3.21 |
|
August |
2.53 |
|
July |
1.90 |
|
June |
2.52 |
|
May |
9.69 |
|
April |
12.19 |
|
March |
6.79 |
|
February |
4.89 |
| 1970 |
January |
2.95 |
| 1969 |
December |
6.20 |
|
November |
8.50 |
|
October |
3.27 |
|
September |
3.15 |
|
August |
2.20 |
|
July |
2.28 |
|
June |
4.45 |
|
May |
7.69 |
|
April |
7.59 |
|
March |
4.27 |
|
February |
1.17 |
| 1969 |
January |
1.04 |
|