| Date |
Pre-Level 1 |
Level 1 |
Level 2 |
| September 2001 - December 2001 |
Yes |
Yes |
No |
| January 2002 - March 2002 |
Yes |
No |
No |
| April 2002 - March 2002 |
No |
Yes |
No |
| July 2002 - August 2002 |
Yes |
Yes |
No |
| September 2002 - December 2002 |
No |
Yes |
Yes |
| January 2003 - March 2003 |
Yes |
No |
No |
| April 2003 - March 2003 |
No |
Yes |
No |
| July 2003 - August 2003 |
Yes |
Yes |
No |
|