| Year |
Month |
Pounds (x1000) |
| 1989 |
December |
86.99 |
|
November |
61.77 |
|
October |
26.59 |
|
September |
5.80 |
|
August |
4.22 |
|
July |
14.73 |
|
June |
88.82 |
|
May |
134.09 |
|
April |
85.62 |
|
March |
51.11 |
|
February |
66.62 |
| 1989 |
January |
58.30 |
| 1988 |
December |
39.48 |
|
November |
26.84 |
|
October |
13.48 |
|
September |
2.09 |
|
August |
2.70 |
|
July |
5.68 |
|
June |
21.51 |
|
May |
26.02 |
|
April |
18.13 |
|
March |
19.51 |
|
February |
32.95 |
| 1988 |
January |
22.28 |
| 1987 |
December |
15.91 |
|
November |
14.29 |
|
October |
9.10 |
|
September |
6.06 |
|
August |
6.99 |
|
July |
6.30 |
|
June |
11.85 |
|
May |
13.48 |
|
April |
7.88 |
|
March |
4.56 |
|
February |
2.72 |
| 1987 |
January |
1.84 |
| 1986 |
December |
2.64 |
|
November |
6.92 |
|
October |
6.66 |
|
September |
3.59 |
|
August |
4.49 |
|
July |
5.25 |
|
June |
12.58 |
|
May |
35.63 |
|
April |
15.16 |
|
March |
7.01 |
|
February |
1.46 |
| 1986 |
January |
1.39 |
| 1985 |
December |
2.72 |
|
November |
2.45 |
|
October |
0.69 |
|
September |
1.31 |
|
August |
1.72 |
|
July |
2.37 |
|
June |
12.81 |
|
May |
7.78 |
|
April |
15.63 |
|
March |
5.40 |
|
February |
3.01 |
| 1985 |
January |
1.52 |
| 1984 |
December |
1.75 |
|
November |
2.48 |
|
October |
1.32 |
|
September |
1.42 |
|
August |
3.14 |
|
July |
4.83 |
|
June |
9.72 |
|
May |
12.29 |
|
April |
10.08 |
|
March |
12.21 |
|
February |
10.16 |
| 1984 |
January |
3.82 |
| 1983 |
December |
7.54 |
|
November |
7.28 |
|
October |
2.21 |
|
September |
1.85 |
|
August |
2.17 |
|
July |
4.49 |
|
June |
8.78 |
|
May |
12.25 |
|
April |
4.26 |
|
March |
5.45 |
|
February |
3.33 |
| 1983 |
January |
2.11 |
| 1982 |
December |
3.19 |
|
November |
2.06 |
|
October |
1.25 |
|
September |
0.66 |
|
August |
1.76 |
|
July |
1.73 |
|
June |
4.25 |
|
May |
7.37 |
|
April |
5.03 |
|
March |
3.89 |
|
February |
4.50 |
| 1982 |
January |
3.00 |
| 1981 |
December |
2.40 |
|
November |
1.87 |
|
October |
0.85 |
|
September |
0.28 |
|
August |
0.02 |
|
July |
0.98 |
|
June |
3.44 |
|
May |
4.84 |
|
April |
5.79 |
|
March |
9.03 |
|
February |
4.67 |
| 1981 |
January |
7.05 |
| 1980 |
December |
11.69 |
|
November |
6.85 |
|
October |
3.22 |
|
September |
1.03 |
|
August |
1.63 |
|
July |
1.91 |
|
June |
2.40 |
|
May |
6.11 |
|
April |
5.68 |
|
March |
5.15 |
|
February |
6.70 |
| 1980 |
January |
6.33 |
| 1979 |
December |
10.65 |
|
November |
3.24 |
|
October |
2.38 |
|
September |
1.30 |
|
August |
0.78 |
|
July |
2.17 |
|
June |
9.58 |
|
May |
15.86 |
|
April |
18.43 |
|
March |
18.83 |
|
February |
12.08 |
| 1979 |
January |
7.97 |
| 1978 |
December |
11.94 |
|
November |
17.64 |
|
October |
14.76 |
|
September |
1.44 |
|
August |
1.90 |
|
July |
4.04 |
|
June |
16.67 |
|
May |
24.84 |
|
April |
17.47 |
|
March |
9.72 |
|
February |
9.69 |
| 1978 |
January |
6.04 |
| 1977 |
December |
13.06 |
|
November |
14.34 |
|
October |
3.68 |
|
September |
1.32 |
|
August |
3.53 |
|
July |
7.76 |
|
June |
10.51 |
|
May |
10.86 |
|
April |
4.26 |
|
March |
1.59 |
|
February |
6.91 |
| 1977 |
January |
5.33 |
| 1976 |
December |
14.73 |
|
November |
14.22 |
|
October |
10.55 |
|
September |
9.59 |
|
August |
35.16 |
|
July |
18.19 |
|
June |
15.18 |
|
May |
9.62 |
|
April |
8.88 |
|
March |
8.01 |
|
February |
6.55 |
| 1976 |
January |
8.40 |
| 1975 |
December |
12.25 |
|
November |
7.55 |
|
October |
11.53 |
|
September |
20.27 |
|
August |
35.02 |
|
July |
33.51 |
|
June |
11.50 |
|
May |
5.90 |
|
April |
5.34 |
|
March |
10.57 |
|
February |
23.88 |
| 1975 |
January |
15.67 |
| 1974 |
December |
18.29 |
|
November |
10.71 |
|
October |
16.64 |
|
September |
11.90 |
|
August |
21.89 |
|
July |
22.69 |
|
June |
13.49 |
|
May |
5.40 |
|
April |
11.08 |
|
March |
10.44 |
|
February |
8.15 |
| 1974 |
January |
3.74 |
| 1973 |
December |
26.76 |
|
November |
19.57 |
|
October |
17.44 |
|
September |
7.56 |
|
August |
5.87 |
|
July |
2.17 |
|
June |
7.49 |
|
May |
6.41 |
|
April |
3.39 |
|
March |
3.14 |
|
February |
4.07 |
| 1973 |
January |
4.90 |
| 1972 |
December |
11.61 |
|
November |
3.63 |
|
October |
4.08 |
|
September |
1.97 |
|
August |
0.36 |
|
July |
3.91 |
|
June |
21.21 |
|
May |
13.45 |
|
April |
16.80 |
|
March |
16.37 |
|
February |
30.82 |
| 1972 |
January |
19.83 |
| 1971 |
December |
43.05 |
|
November |
29.00 |
|
October |
9.30 |
|
September |
2.46 |
|
August |
2.67 |
|
July |
5.76 |
|
June |
14.86 |
|
May |
12.40 |
|
April |
11.28 |
|
March |
9.94 |
|
February |
19.36 |
| 1971 |
January |
8.92 |
| 1970 |
December |
60.77 |
|
November |
49.02 |
|
October |
26.97 |
|
September |
9.50 |
|
August |
2.85 |
|
July |
3.59 |
|
June |
12.65 |
|
May |
25.18 |
|
April |
48.06 |
|
March |
53.71 |
|
February |
38.85 |
| 1970 |
January |
8.27 |
| 1969 |
December |
44.78 |
|
November |
46.16 |
|
October |
21.79 |
|
September |
9.75 |
|
August |
6.05 |
|
July |
10.53 |
|
June |
21.05 |
|
May |
38.80 |
|
April |
27.79 |
|
March |
43.34 |
|
February |
26.24 |
| 1969 |
January |
18.38 |
|