| Year |
Month |
Pounds (x1000) |
| 2008 |
December |
0.00 |
|
November |
34.82 |
|
October |
67.61 |
|
September |
57.46 |
|
August |
51.97 |
|
July |
55.88 |
|
June |
53.98 |
|
May |
78.01 |
|
April |
73.06 |
|
March |
55.57 |
|
February |
51.23 |
| 2008 |
January |
38.94 |
| 2007 |
December |
33.53 |
|
November |
49.41 |
|
October |
67.03 |
|
September |
68.69 |
|
August |
45.30 |
|
July |
50.18 |
|
June |
55.24 |
|
May |
50.76 |
|
April |
44.35 |
|
March |
56.81 |
|
February |
33.46 |
| 2007 |
January |
38.23 |
| 2006 |
December |
50.34 |
|
November |
55.19 |
|
October |
62.90 |
|
September |
46.17 |
|
August |
38.08 |
|
July |
41.91 |
|
June |
58.15 |
|
May |
73.38 |
|
April |
51.55 |
|
March |
41.33 |
|
February |
25.94 |
| 2006 |
January |
30.87 |
| 2005 |
December |
36.57 |
|
November |
44.36 |
|
October |
67.96 |
|
September |
55.24 |
|
August |
52.59 |
|
July |
34.01 |
|
June |
49.47 |
|
May |
71.29 |
|
April |
76.47 |
|
March |
58.11 |
|
February |
58.50 |
| 2005 |
January |
41.54 |
| 2004 |
December |
36.50 |
|
November |
38.57 |
|
October |
59.17 |
|
September |
55.33 |
|
August |
61.25 |
|
July |
87.00 |
|
June |
99.04 |
|
May |
86.50 |
|
April |
82.12 |
|
March |
76.45 |
|
February |
46.46 |
| 2004 |
January |
37.62 |
| 2003 |
December |
35.51 |
|
November |
36.82 |
|
October |
49.93 |
|
September |
31.29 |
|
August |
25.48 |
|
July |
35.10 |
|
June |
42.74 |
|
May |
26.13 |
|
April |
31.64 |
|
March |
57.47 |
|
February |
58.95 |
| 2003 |
January |
27.68 |
| 2002 |
December |
35.90 |
|
November |
32.35 |
|
October |
44.56 |
|
September |
31.49 |
|
August |
60.11 |
|
July |
67.77 |
|
June |
46.01 |
|
May |
26.64 |
|
April |
30.20 |
|
March |
54.34 |
|
February |
33.30 |
| 2002 |
January |
27.12 |
| 2001 |
December |
31.47 |
|
November |
31.02 |
|
October |
37.82 |
|
September |
16.11 |
|
August |
22.98 |
|
July |
35.20 |
|
June |
28.08 |
|
May |
13.71 |
|
April |
4.53 |
|
March |
18.59 |
|
February |
19.14 |
| 2001 |
January |
13.27 |
| 2000 |
December |
23.41 |
|
November |
22.49 |
|
October |
17.31 |
|
September |
17.51 |
|
August |
20.52 |
|
July |
24.66 |
|
June |
22.39 |
|
May |
42.18 |
|
April |
26.06 |
|
March |
27.41 |
|
February |
18.66 |
| 2000 |
January |
14.14 |
| 1999 |
December |
23.13 |
|
November |
17.83 |
|
October |
16.93 |
|
September |
10.53 |
|
August |
11.51 |
|
July |
21.27 |
|
June |
38.61 |
|
May |
38.15 |
|
April |
55.16 |
|
March |
30.79 |
|
February |
32.17 |
| 1999 |
January |
17.36 |
| 1998 |
December |
21.36 |
|
November |
22.82 |
|
October |
17.55 |
|
September |
11.52 |
|
August |
17.66 |
|
July |
29.38 |
|
June |
22.20 |
|
May |
27.70 |
|
April |
17.44 |
|
March |
16.23 |
|
February |
13.53 |
| 1998 |
January |
12.93 |
| 1997 |
December |
20.94 |
|
November |
18.23 |
|
October |
13.87 |
|
September |
8.02 |
|
August |
5.20 |
|
July |
16.84 |
|
June |
11.05 |
|
May |
12.67 |
|
April |
21.30 |
|
March |
15.06 |
|
February |
10.04 |
| 1997 |
January |
6.37 |
| 1996 |
December |
13.26 |
|
November |
11.19 |
|
October |
11.07 |
|
September |
8.73 |
|
August |
6.90 |
|
July |
6.85 |
|
June |
16.17 |
|
May |
10.31 |
|
April |
9.56 |
|
March |
7.89 |
|
February |
7.07 |
| 1996 |
January |
7.15 |
| 1995 |
December |
9.29 |
|
November |
7.17 |
|
October |
6.08 |
|
September |
3.35 |
|
August |
2.96 |
|
July |
4.46 |
|
June |
6.73 |
|
May |
12.28 |
|
April |
9.57 |
|
March |
8.85 |
|
February |
8.62 |
| 1995 |
January |
5.73 |
| 1994 |
December |
17.56 |
|
November |
8.89 |
|
October |
8.04 |
|
September |
3.46 |
|
August |
4.89 |
|
July |
4.59 |
|
June |
5.89 |
|
May |
7.47 |
|
April |
6.32 |
|
March |
9.73 |
|
February |
11.00 |
| 1994 |
January |
6.14 |
| 1993 |
December |
11.56 |
|
November |
7.20 |
|
October |
2.02 |
|
September |
2.46 |
|
August |
4.14 |
|
July |
7.62 |
|
June |
6.75 |
|
May |
9.96 |
|
April |
13.80 |
|
March |
9.12 |
|
February |
5.42 |
| 1993 |
January |
3.19 |
| 1992 |
December |
8.67 |
|
November |
4.69 |
|
October |
5.37 |
|
September |
1.23 |
|
August |
1.60 |
|
July |
3.56 |
|
June |
3.32 |
|
May |
3.10 |
|
April |
3.79 |
|
March |
4.13 |
|
February |
3.63 |
| 1992 |
January |
2.33 |
| 1991 |
December |
5.35 |
|
November |
6.48 |
|
October |
5.24 |
|
September |
1.01 |
|
August |
1.53 |
|
July |
1.03 |
|
June |
1.73 |
|
May |
1.86 |
|
April |
6.62 |
|
March |
8.76 |
|
February |
9.28 |
| 1991 |
January |
5.64 |
| 1990 |
December |
5.81 |
|
November |
5.05 |
|
October |
3.31 |
|
September |
2.53 |
|
August |
0.46 |
|
July |
1.54 |
|
June |
3.01 |
|
May |
4.16 |
|
April |
4.02 |
|
March |
7.28 |
|
February |
2.95 |
| 1990 |
January |
2.83 |
|