| Year |
Month |
Pounds (x1000) |
| 2008 |
December |
0.00 |
|
November |
63.38 |
|
October |
116.52 |
|
September |
83.02 |
|
August |
89.80 |
|
July |
69.92 |
|
June |
75.49 |
|
May |
148.34 |
|
April |
162.31 |
|
March |
177.09 |
|
February |
98.84 |
| 2008 |
January |
90.56 |
| 2007 |
December |
125.72 |
|
November |
182.56 |
|
October |
135.14 |
|
September |
118.95 |
|
August |
188.42 |
|
July |
116.41 |
|
June |
52.92 |
|
May |
81.84 |
|
April |
145.01 |
|
March |
147.56 |
|
February |
63.70 |
| 2007 |
January |
30.23 |
| 2006 |
December |
37.14 |
|
November |
112.85 |
|
October |
118.66 |
|
September |
89.57 |
|
August |
103.51 |
|
July |
109.12 |
|
June |
75.40 |
|
May |
151.04 |
|
April |
221.76 |
|
March |
181.99 |
|
February |
86.04 |
| 2006 |
January |
54.58 |
| 2005 |
December |
176.99 |
|
November |
181.54 |
|
October |
131.09 |
|
September |
72.83 |
|
August |
90.39 |
|
July |
71.81 |
|
June |
46.01 |
|
May |
98.14 |
|
April |
155.80 |
|
March |
164.33 |
|
February |
143.23 |
| 2005 |
January |
107.58 |
| 2004 |
December |
192.04 |
|
November |
240.25 |
|
October |
137.82 |
|
September |
118.43 |
|
August |
89.08 |
|
July |
75.07 |
|
June |
89.86 |
|
May |
177.32 |
|
April |
426.22 |
|
March |
411.97 |
|
February |
177.68 |
| 2004 |
January |
89.00 |
| 2003 |
December |
99.41 |
|
November |
101.12 |
|
October |
103.78 |
|
September |
142.21 |
|
August |
105.40 |
|
July |
40.24 |
|
June |
37.79 |
|
May |
93.62 |
|
April |
159.03 |
|
March |
165.95 |
|
February |
134.70 |
| 2003 |
January |
141.79 |
| 2002 |
December |
143.70 |
|
November |
126.10 |
|
October |
149.97 |
|
September |
135.20 |
|
August |
111.64 |
|
July |
75.81 |
|
June |
44.57 |
|
May |
84.02 |
|
April |
230.51 |
|
March |
140.27 |
|
February |
74.77 |
| 2002 |
January |
59.42 |
| 2001 |
December |
68.45 |
|
November |
131.14 |
|
October |
142.77 |
|
September |
100.37 |
|
August |
76.26 |
|
July |
62.72 |
|
June |
74.78 |
|
May |
136.12 |
|
April |
137.38 |
|
March |
135.69 |
|
February |
112.00 |
| 2001 |
January |
67.65 |
| 2000 |
December |
64.47 |
|
November |
130.28 |
|
October |
145.12 |
|
September |
114.74 |
|
August |
146.17 |
|
July |
167.99 |
|
June |
131.17 |
|
May |
159.84 |
|
April |
181.53 |
|
March |
161.73 |
|
February |
79.18 |
| 2000 |
January |
45.46 |
| 1999 |
December |
54.17 |
|
November |
119.89 |
|
October |
176.35 |
|
September |
154.41 |
|
August |
103.10 |
|
July |
75.70 |
|
June |
95.89 |
|
May |
113.11 |
|
April |
124.77 |
|
March |
60.22 |
|
February |
29.92 |
| 1999 |
January |
27.57 |
| 1998 |
December |
44.74 |
|
November |
121.83 |
|
October |
117.37 |
|
September |
73.10 |
|
August |
35.04 |
|
July |
35.62 |
|
June |
50.96 |
|
May |
76.96 |
|
April |
80.18 |
|
March |
49.60 |
|
February |
32.90 |
| 1998 |
January |
20.65 |
| 1997 |
December |
28.25 |
|
November |
46.71 |
|
October |
67.87 |
|
September |
42.27 |
|
August |
28.72 |
|
July |
51.54 |
|
June |
53.88 |
|
May |
146.84 |
|
April |
206.55 |
|
March |
137.62 |
|
February |
76.80 |
| 1997 |
January |
26.62 |
| 1996 |
December |
25.90 |
|
November |
81.55 |
|
October |
98.59 |
|
September |
65.99 |
|
August |
66.17 |
|
July |
38.52 |
|
June |
29.56 |
|
May |
72.74 |
|
April |
125.50 |
|
March |
71.82 |
|
February |
37.94 |
| 1996 |
January |
42.06 |
| 1995 |
December |
42.15 |
|
November |
68.72 |
|
October |
83.19 |
|
September |
40.21 |
|
August |
47.10 |
|
July |
41.36 |
|
June |
47.79 |
|
May |
93.09 |
|
April |
134.44 |
|
March |
131.86 |
|
February |
79.85 |
| 1995 |
January |
69.20 |
| 1994 |
December |
76.62 |
|
November |
117.56 |
|
October |
124.02 |
|
September |
84.44 |
|
August |
119.18 |
|
July |
61.30 |
|
June |
55.50 |
|
May |
65.98 |
|
April |
65.16 |
|
March |
35.01 |
|
February |
17.31 |
| 1994 |
January |
13.20 |
| 1993 |
December |
29.01 |
|
November |
77.61 |
|
October |
78.08 |
|
September |
92.12 |
|
August |
82.15 |
|
July |
29.39 |
|
June |
35.60 |
|
May |
57.42 |
|
April |
102.65 |
|
March |
50.84 |
|
February |
35.52 |
| 1993 |
January |
13.92 |
| 1992 |
December |
33.24 |
|
November |
120.14 |
|
October |
130.21 |
|
September |
116.82 |
|
August |
149.55 |
|
July |
85.60 |
|
June |
59.07 |
|
May |
63.06 |
|
April |
88.51 |
|
March |
58.96 |
|
February |
26.58 |
| 1992 |
January |
15.48 |
| 1991 |
December |
60.58 |
|
November |
127.67 |
|
October |
131.72 |
|
September |
155.34 |
|
August |
158.24 |
|
July |
50.05 |
|
June |
34.14 |
|
May |
144.66 |
|
April |
146.17 |
|
March |
66.92 |
|
February |
71.41 |
| 1991 |
January |
31.79 |
| 1990 |
December |
68.26 |
|
November |
148.72 |
|
October |
116.86 |
|
September |
57.69 |
|
August |
36.25 |
|
July |
31.80 |
|
June |
29.52 |
|
May |
71.55 |
|
April |
95.17 |
|
March |
61.79 |
|
February |
30.60 |
| 1990 |
January |
30.33 |
|