| Year | High                                  | Month    | Low                                         | Month                                             |
|------|---------------------------------------|----------|---------------------------------------------|---------------------------------------------------|
| 2003 |  $    252.38 | March    |  $     0.00** | Jan.,      May, June,July,      Aug., Sept.       |
| 2004 |  $    181.66 | December |  $     0.00** | Jan.,      June, July,Aug.,      Sept., Oct.      |
| 2005 |  $    315.65 | July     |  $     0.00** | Jan.,      April, May,June,      July, Sept.      |
| 2006 |  $    769.90 | August   |  $     0.00** | April,      May, June, July,Aug.,      Nov., Dec. |
| 2007 |  $    571.60 | August   |  $     0.00** | May,      June,July,      Sept.                   |

| Year | High                                       | Month    | Low                                                   | Month |
|------|--------------------------------------------|----------|-------------------------------------------------------|-------|
| 2003 |  $   113.89            | February |  $       9.13 | May   |
| 2004 |  $     65.06 | July     |  $     10.21            | June  |
| 2005 |  $   139.76            | December |  $       7.68 | May   |
| 2006 |  $   189.87            | July     |  $     (2.00)           | May   |
| 2007 |  $   197.79            | July     |  $       0.86 | March |

| Year | High                                       | Month     | Low                                        | Month    |
|------|--------------------------------------------|-----------|--------------------------------------------|----------|
| 2003 |  $     39.92 | December  |  $     27.75 | March    |
| 2004 |  $     63.00 | August    |  $     39.67 | January  |
| 2005 |  $     62.75 | September |  $     51.10 | June     |
| 2006 |  $     57.75 | February  |  $     37.50 | November |
| 2007 |  $     56.80 | November  |  $     38.75 | January  |

| Year |  High                                            | Month    |  Low                                             | Month     |
|------|-------------------------------------------------------|----------|-------------------------------------------------------|-----------|
| 2003 |  $       9.58 | February |  $       2.66 | August    |
| 2004 |  $       8.73 | November |  $       4.57 | September |
| 2005 |  $     15.38            | December |  $       5.83 | January   |
| 2006 |  $     10.63            | January  |  $       4.20 | September |
| 2007 |  $       9.90 | May      |  $       5.20 | September |

| Year | High                                       | Month    | Low                                        | Month    |
|------|--------------------------------------------|----------|--------------------------------------------|----------|
| 2003 |  $     43.62 | March    |  $     23.00 | April    |
| 2004 |  $     35.38 | October  |  $     22.12 | December |
| 2005 |  $     54.38 | October  |  $     26.88 | January  |
| 2006 |  $     54.25 | April    |  $     35.00 | October  |
| 2007 |  $     72.52 | December |  $     37.23 | January  |

| Year | High                                                       | Month    | Low                                                        | Month    |
|------|------------------------------------------------------------|----------|------------------------------------------------------------|----------|
| 2003 |  $        221 | December |  $        135 | January  |
| 2004 |  $        730 | November |  $        210 | January  |
| 2005 |  $     1,610                 | December |  $        640 | January  |
| 2006 |  $     1,598                 | January  |  $        445 | November |
| 2007 |  $        715 | June     |  $        405 | January  |