| Year |
Month |
Pounds (x1000) |
| 2008 |
December |
0.00 |
|
November |
0.00 |
|
October |
0.00 |
|
September |
0.00 |
|
August |
0.06 |
|
July |
10.18 |
|
June |
8.16 |
|
May |
13.85 |
|
April |
5.88 |
|
March |
5.09 |
|
February |
12.40 |
| 2008 |
January |
7.42 |
| 2007 |
December |
8.48 |
|
November |
13.62 |
|
October |
6.96 |
|
September |
15.86 |
|
August |
27.52 |
|
July |
20.83 |
|
June |
30.96 |
|
May |
40.38 |
|
April |
26.81 |
|
March |
23.94 |
|
February |
21.76 |
| 2007 |
January |
31.95 |
| 2006 |
December |
14.79 |
|
November |
28.87 |
|
October |
6.57 |
|
September |
4.06 |
|
August |
22.51 |
|
July |
27.23 |
|
June |
35.49 |
|
May |
36.29 |
|
April |
16.71 |
|
March |
11.09 |
|
February |
23.25 |
| 2006 |
January |
10.27 |
| 2005 |
December |
14.11 |
|
November |
13.37 |
|
October |
8.33 |
|
September |
8.25 |
|
August |
12.06 |
|
July |
24.26 |
|
June |
29.03 |
|
May |
35.39 |
|
April |
38.64 |
|
March |
25.93 |
|
February |
19.88 |
| 2005 |
January |
14.71 |
| 2004 |
December |
9.36 |
|
November |
14.63 |
|
October |
28.96 |
|
September |
15.74 |
|
August |
25.18 |
|
July |
25.84 |
|
June |
35.13 |
|
May |
36.91 |
|
April |
38.10 |
|
March |
34.53 |
|
February |
17.99 |
| 2004 |
January |
19.25 |
| 2003 |
December |
23.27 |
|
November |
19.61 |
|
October |
12.25 |
|
September |
9.74 |
|
August |
25.25 |
|
July |
25.01 |
|
June |
36.00 |
|
May |
88.18 |
|
April |
61.44 |
|
March |
32.13 |
|
February |
27.86 |
| 2003 |
January |
13.43 |
| 2002 |
December |
30.83 |
|
November |
56.58 |
|
October |
24.59 |
|
September |
14.57 |
|
August |
11.08 |
|
July |
19.68 |
|
June |
32.17 |
|
May |
24.14 |
|
April |
38.61 |
|
March |
18.43 |
|
February |
13.50 |
| 2002 |
January |
31.70 |
| 2001 |
December |
9.90 |
|
November |
18.95 |
|
October |
6.76 |
|
September |
8.90 |
|
August |
12.63 |
|
July |
23.09 |
|
June |
39.29 |
|
May |
36.39 |
|
April |
35.06 |
|
March |
40.71 |
|
February |
22.49 |
| 2001 |
January |
65.76 |
| 2000 |
December |
65.47 |
|
November |
30.76 |
|
October |
30.29 |
|
September |
31.48 |
|
August |
38.36 |
|
July |
65.50 |
|
June |
86.07 |
|
May |
86.34 |
|
April |
26.37 |
|
March |
57.16 |
|
February |
63.94 |
| 2000 |
January |
50.28 |
| 1999 |
December |
73.18 |
|
November |
107.79 |
|
October |
39.59 |
|
September |
33.35 |
|
August |
81.09 |
|
July |
126.29 |
|
June |
117.25 |
|
May |
87.93 |
|
April |
116.74 |
|
March |
96.95 |
|
February |
66.41 |
| 1999 |
January |
64.22 |
| 1998 |
December |
67.15 |
|
November |
51.47 |
|
October |
53.28 |
|
September |
92.33 |
|
August |
60.06 |
|
July |
122.64 |
|
June |
135.89 |
|
May |
99.79 |
|
April |
156.87 |
|
March |
121.08 |
|
February |
118.93 |
| 1998 |
January |
97.53 |
| 1997 |
December |
76.90 |
|
November |
82.84 |
|
October |
30.39 |
|
September |
68.82 |
|
August |
67.16 |
|
July |
73.63 |
|
June |
78.39 |
|
May |
59.25 |
|
April |
54.35 |
|
March |
43.17 |
|
February |
35.24 |
| 1997 |
January |
34.80 |
| 1996 |
December |
34.14 |
|
November |
22.23 |
|
October |
21.32 |
|
September |
19.14 |
|
August |
52.10 |
|
July |
50.70 |
|
June |
73.31 |
|
May |
124.79 |
|
April |
61.44 |
|
March |
34.81 |
|
February |
14.36 |
| 1996 |
January |
46.75 |
| 1995 |
December |
29.52 |
|
November |
37.12 |
|
October |
13.82 |
|
September |
35.89 |
|
August |
46.14 |
|
July |
37.36 |
|
June |
83.47 |
|
May |
88.41 |
|
April |
50.16 |
|
March |
90.40 |
|
February |
37.10 |
| 1995 |
January |
75.41 |
| 1994 |
December |
60.33 |
|
November |
40.38 |
|
October |
18.73 |
|
September |
18.22 |
|
August |
53.77 |
|
July |
84.25 |
|
June |
63.10 |
|
May |
62.56 |
|
April |
51.51 |
|
March |
37.07 |
|
February |
39.64 |
| 1994 |
January |
46.98 |
| 1993 |
December |
32.71 |
|
November |
58.19 |
|
October |
15.57 |
|
September |
35.19 |
|
August |
24.17 |
|
July |
23.55 |
|
June |
81.18 |
|
May |
96.93 |
|
April |
76.38 |
|
March |
110.35 |
|
February |
39.46 |
| 1993 |
January |
26.39 |
| 1992 |
December |
39.91 |
|
November |
39.36 |
|
October |
22.69 |
|
September |
54.61 |
|
August |
70.81 |
|
July |
79.29 |
|
June |
48.45 |
|
May |
106.21 |
|
April |
98.47 |
|
March |
85.16 |
|
February |
60.34 |
| 1992 |
January |
78.95 |
| 1991 |
December |
52.46 |
|
November |
58.18 |
|
October |
40.48 |
|
September |
23.62 |
|
August |
27.57 |
|
July |
35.55 |
|
June |
39.18 |
|
May |
63.64 |
|
April |
57.09 |
|
March |
81.98 |
|
February |
34.02 |
| 1991 |
January |
34.56 |
| 1990 |
December |
29.61 |
|
November |
39.87 |
|
October |
54.80 |
|
September |
42.01 |
|
August |
57.65 |
|
July |
84.02 |
|
June |
68.29 |
|
May |
40.94 |
|
April |
64.17 |
|
March |
76.17 |
|
February |
46.30 |
| 1990 |
January |
20.86 |
|