| Year |
Month |
Pounds (x1000) |
| 1968 |
December |
2.11 |
|
November |
2.82 |
|
October |
8.52 |
|
September |
3.85 |
|
August |
12.00 |
|
July |
3.49 |
|
June |
2.91 |
|
May |
13.29 |
|
April |
12.41 |
|
March |
4.55 |
|
February |
2.96 |
| 1968 |
January |
1.18 |
| 1967 |
December |
1.67 |
|
November |
5.00 |
|
October |
6.98 |
|
September |
14.86 |
|
August |
8.19 |
|
July |
6.52 |
|
June |
4.80 |
|
May |
5.49 |
|
April |
7.29 |
|
March |
5.26 |
|
February |
2.22 |
| 1967 |
January |
1.07 |
| 1966 |
December |
5.12 |
|
November |
7.14 |
|
October |
8.42 |
|
September |
13.35 |
|
August |
7.36 |
|
July |
10.85 |
|
June |
7.03 |
|
May |
10.00 |
|
April |
6.34 |
|
March |
4.49 |
|
February |
1.14 |
| 1966 |
January |
0.74 |
| 1965 |
December |
4.24 |
|
November |
9.16 |
|
October |
13.09 |
|
September |
7.87 |
|
August |
11.57 |
|
July |
9.75 |
|
June |
7.85 |
|
May |
8.35 |
|
April |
7.60 |
|
March |
3.45 |
|
February |
1.59 |
| 1965 |
January |
3.52 |
| 1964 |
December |
5.47 |
|
November |
6.71 |
|
October |
5.63 |
|
September |
4.35 |
|
August |
4.85 |
|
July |
9.07 |
|
June |
7.98 |
|
May |
7.93 |
|
April |
15.87 |
|
March |
9.71 |
|
February |
3.67 |
| 1964 |
January |
2.34 |
| 1963 |
December |
6.37 |
|
November |
11.29 |
|
October |
10.05 |
|
September |
6.51 |
|
August |
8.73 |
|
July |
13.59 |
|
June |
11.14 |
|
May |
23.98 |
|
April |
15.66 |
|
March |
12.44 |
|
February |
2.51 |
| 1963 |
January |
0.79 |
| 1962 |
December |
5.80 |
|
November |
14.99 |
|
October |
11.29 |
|
September |
9.37 |
|
August |
8.88 |
|
July |
6.40 |
|
June |
11.79 |
|
May |
8.79 |
|
April |
14.85 |
|
March |
10.83 |
|
February |
2.31 |
| 1962 |
January |
0.06 |
| 1961 |
December |
2.92 |
|
November |
9.71 |
|
October |
15.37 |
|
September |
10.92 |
|
August |
8.96 |
|
July |
10.76 |
|
June |
11.64 |
|
May |
12.60 |
|
April |
15.67 |
|
March |
9.34 |
|
February |
6.64 |
| 1961 |
January |
1.72 |
| 1960 |
December |
5.28 |
|
November |
11.56 |
|
October |
9.75 |
|
September |
9.63 |
|
August |
7.19 |
|
July |
5.50 |
|
June |
6.11 |
|
May |
8.24 |
|
April |
17.51 |
|
March |
4.98 |
|
February |
2.16 |
| 1960 |
January |
1.22 |
| 1959 |
December |
5.71 |
|
November |
12.43 |
|
October |
11.75 |
|
September |
11.72 |
|
August |
9.74 |
|
July |
9.01 |
|
June |
9.33 |
|
May |
15.90 |
|
April |
12.75 |
|
March |
11.29 |
|
February |
5.06 |
| 1959 |
January |
2.07 |
| 1958 |
December |
6.53 |
|
November |
8.63 |
|
October |
12.04 |
|
September |
5.02 |
|
August |
5.00 |
|
July |
9.43 |
|
June |
12.99 |
|
May |
28.77 |
|
April |
34.46 |
|
March |
14.66 |
|
February |
6.67 |
| 1958 |
January |
3.87 |
| 1957 |
December |
8.98 |
|
November |
17.19 |
|
October |
18.99 |
|
September |
9.40 |
|
August |
8.62 |
|
July |
11.10 |
|
June |
17.63 |
|
May |
75.66 |
|
April |
20.14 |
|
March |
11.89 |
|
February |
6.18 |
| 1957 |
January |
1.92 |
| 1956 |
December |
11.15 |
|
November |
15.63 |
|
October |
12.39 |
|
September |
11.47 |
|
August |
10.37 |
|
July |
20.25 |
|
June |
19.47 |
|
May |
31.27 |
|
April |
22.22 |
|
March |
13.88 |
|
February |
11.36 |
| 1956 |
January |
4.35 |
| 1955 |
December |
8.47 |
|
November |
20.47 |
|
October |
21.22 |
|
September |
12.21 |
|
August |
13.06 |
|
July |
25.60 |
|
June |
35.57 |
|
May |
50.43 |
|
April |
51.44 |
|
March |
23.51 |
|
February |
5.58 |
| 1955 |
January |
2.18 |
| 1954 |
December |
6.16 |
|
November |
12.59 |
|
October |
14.89 |
|
September |
10.32 |
|
August |
25.23 |
|
July |
24.71 |
|
June |
29.66 |
|
May |
25.59 |
|
April |
38.17 |
|
March |
21.76 |
|
February |
13.04 |
| 1954 |
January |
3.35 |
| 1953 |
December |
9.14 |
|
November |
10.65 |
|
October |
19.56 |
|
September |
12.86 |
|
August |
13.81 |
|
July |
14.62 |
|
June |
12.62 |
|
May |
24.18 |
|
April |
15.27 |
|
March |
14.21 |
|
February |
7.17 |
| 1953 |
January |
4.64 |
| 1952 |
December |
5.10 |
|
November |
9.28 |
|
October |
13.73 |
|
September |
9.28 |
|
August |
12.69 |
|
July |
18.72 |
|
June |
22.16 |
|
May |
30.03 |
|
April |
34.50 |
|
March |
8.00 |
|
February |
6.38 |
| 1952 |
January |
11.85 |
| 1951 |
December |
8.45 |
|
November |
11.69 |
|
October |
27.70 |
|
September |
17.68 |
|
August |
13.21 |
|
July |
15.43 |
|
June |
19.74 |
|
May |
22.26 |
|
April |
27.98 |
|
March |
15.10 |
|
February |
6.50 |
| 1951 |
January |
3.23 |
| 1950 |
December |
13.19 |
|
November |
25.19 |
|
October |
35.56 |
|
September |
27.89 |
|
August |
18.62 |
|
July |
19.85 |
|
June |
33.71 |
|
May |
27.38 |
|
April |
22.77 |
|
March |
21.83 |
|
February |
17.18 |
| 1950 |
January |
7.15 |
| 1949 |
December |
8.23 |
|
November |
12.95 |
|
October |
16.37 |
|
September |
10.20 |
|
August |
7.40 |
|
July |
18.87 |
|
June |
26.07 |
|
May |
29.76 |
|
April |
23.65 |
|
March |
11.47 |
|
February |
8.23 |
| 1949 |
January |
14.36 |
| 1948 |
December |
8.64 |
|
November |
16.77 |
|
October |
18.86 |
|
September |
11.39 |
|
August |
11.65 |
|
July |
13.30 |
|
June |
15.29 |
|
May |
19.54 |
|
April |
25.55 |
|
March |
15.35 |
|
February |
9.15 |
| 1948 |
January |
6.04 |
|