| Passive ownership stake (update) | SC 13G/A | 2002-10-10 | - |
| Insider trade | 4 | 2002-10-08 | 2002-10-08 |
| Major company event | 8-K | 2002-08-13 | 2002-08-12 |
| Quarterly report | 10-Q | 2002-08-13 | 2002-06-30 |
| Quarterly report | 10-Q | 2002-05-14 | 2002-03-31 |
| Annual report to shareholders | ARS | 2002-05-02 | 2001-12-31 |
| Proxy statement | DEF 14A | 2002-04-15 | 2002-05-23 |
| Proxy statement | DEF 14A | 2002-04-08 | 2002-05-23 |
| 10-K405 | - | 2002-03-29 | 2001-12-31 |
| Passive ownership stake (update) | SC 13G/A | 2002-02-25 | - |
| Passive ownership stake (update) | SC 13G/A | 2002-02-13 | - |
| Passive ownership stake (update) | SC 13G/A | 2002-02-12 | - |
| Passive ownership stake (update) | SC 13G/A | 2002-02-12 | - |
| Passive ownership stake (update) | SC 13G/A | 2002-02-12 | - |
| Quarterly report | 10-Q | 2001-11-13 | 2001-09-30 |
| Passive ownership stake (update) | SC 13G/A | 2001-11-09 | - |
| Quarterly report | 10-Q | 2001-08-13 | 2001-06-30 |
| Passive ownership stake | SC 13G | 2001-08-10 | - |
| Quarterly report | 10-Q | 2001-05-14 | 2001-03-31 |
| Proxy statement | DEF 14A | 2001-04-10 | 2001-05-11 |
| 10-K405 | - | 2001-03-30 | 2000-12-31 |
| Major company event | 8-K | 2001-03-22 | 2001-03-20 |
| Major company event | 8-K | 2001-03-12 | 2001-02-15 |
| 424B3 | - | 2001-03-02 | - |
| 424B3 | - | 2001-02-20 | - |
| 424B1 | - | 2001-02-20 | - |
| Major company event | 8-K | 2001-02-14 | 2001-02-13 |
| Passive ownership stake (update) | SC 13G/A | 2001-02-14 | - |
| S-3/A | - | 2001-02-13 | - |
| Passive ownership stake (update) | SC 13G/A | 2001-02-13 | - |
| Passive ownership stake (update) | SC 13G/A | 2001-02-12 | - |
| S-4/A | - | 2001-02-02 | - |
| Passive ownership stake (update) | SC 13G/A | 2001-01-23 | - |
| Employee stock plan | S-8 | 2000-12-28 | - |
| Major company event | 8-K | 2000-12-22 | 2000-12-22 |
| S-4 | - | 2000-12-01 | - |
| Securities registration | S-3 | 2000-11-22 | - |
| Passive ownership stake | SC 13G | 2000-11-13 | - |
| Quarterly report | 10-Q | 2000-11-13 | 2000-09-30 |
| Passive ownership stake (update) | SC 13G/A | 2000-11-08 | - |
| Major company event | 8-K | 2000-09-19 | 2000-09-18 |
| DEFS14A | - | 2000-09-08 | 2000-10-12 |
| Major company event | 8-K | 2000-09-05 | 2000-09-01 |
| PRES14A | - | 2000-08-25 | 2000-10-11 |
| Quarterly report | 10-Q | 2000-08-11 | 2000-06-30 |
| S-3/A | - | 2000-06-12 | - |
| Securities registration | S-3 | 2000-06-06 | - |
| Employee stock plan | S-8 | 2000-05-24 | - |
| Quarterly report | 10-Q | 2000-05-11 | 2000-03-31 |
| Proxy statement | DEF 14A | 2000-04-11 | 2000-05-23 |
