| Prospectus supplement | 424B2 | 2002-06-21 | - |
| Quarterly report | 10-Q | 2002-05-10 | 2002-03-31 |
| Prospectus supplement | 424B2 | 2002-04-12 | - |
| Prospectus supplement | 424B2 | 2002-04-11 | - |
| Annual report to shareholders | ARS | 2002-03-06 | 2001-12-31 |
| Proxy statement | DEF 14A | 2002-03-05 | 2002-04-16 |
| 10-K405 | - | 2002-02-22 | 2001-12-30 |
| Passive ownership stake | SC 13G | 2002-02-14 | - |
| Passive ownership stake | SC 13G | 2002-02-14 | - |
| Passive ownership stake | SC 13G | 2002-02-04 | - |
| Quarterly report | 10-Q | 2001-11-08 | 2001-09-30 |
| Employee stock plan | S-8 | 2001-09-27 | - |
| Quarterly report | 10-Q | 2001-08-15 | 2001-07-01 |
| Activist ownership stake (update) | SC 13D/A | 2001-07-17 | - |
| Activist ownership stake (update) | SC 13D/A | 2001-06-27 | - |
| Activist ownership stake (update) | SC 13D/A | 2001-06-26 | - |
| Employee plan annual report | 11-K | 2001-06-22 | 2000-12-24 |
| Employee plan annual report | 11-K | 2001-06-22 | 2000-12-24 |
| Activist ownership stake (update) | SC 13D/A | 2001-05-25 | - |
| Quarterly report | 10-Q | 2001-05-15 | 2001-04-01 |
| Major company event | 8-K | 2001-04-02 | 2001-04-02 |
| Proxy statement | DEF 14A | 2001-03-06 | 2001-04-17 |
| 10-K405 | - | 2001-02-21 | 2000-12-31 |
| Activist ownership stake (update) | SC 13D/A | 2001-01-11 | - |
| Passive ownership stake | SC 13G | 2001-01-08 | - |
| RW | - | 2000-12-08 | - |
| RW | - | 2000-12-08 | - |
| Employee stock plan | S-8 | 2000-11-13 | - |
| Quarterly report | 10-Q | 2000-11-08 | 2000-09-24 |
| Quarterly report | 10-Q | 2000-08-09 | 2000-06-25 |
| Employee plan annual report | 11-K | 2000-06-23 | 1999-12-24 |
| Employee plan annual report | 11-K | 2000-06-23 | 1999-12-24 |
| Proxy materials | DEFA14A | 2000-05-17 | - |
| Quarterly report | 10-Q | 2000-05-10 | 2000-03-26 |
| Proxy materials | DEFA14A | 2000-05-05 | - |
| Proxy statement | DEF 14A | 2000-04-24 | 2000-05-23 |
| PRE 14A | - | 2000-04-21 | 2000-04-21 |
| PRER14A | - | 2000-04-05 | - |
| PRER14A | - | 2000-03-20 | - |
| Annual report | 10-K | 2000-03-14 | 1999-12-26 |
| PRER14A | - | 2000-03-14 | - |
| PRE 14A | - | 2000-02-04 | 2000-04-27 |
| Securities registration | S-3 | 2000-01-28 | - |
| S-8 POS | - | 1999-12-29 | - |
| Prospectus supplement | 424B2 | 1999-11-17 | - |
| Quarterly report | 10-Q | 1999-11-10 | 1999-09-26 |
| Prospectus supplement | 424B2 | 1999-11-04 | - |
| Quarterly report | 10-Q | 1999-08-11 | 1999-06-27 |
| Employee plan annual report | 11-K | 1999-06-22 | 1998-12-24 |
| Employee plan annual report | 11-K | 1999-06-22 | 1998-12-24 |
