| Passive ownership stake (update) | SC 13G/A | 2002-06-10 | - |
| Major company event | 8-K | 2002-05-21 | 2002-04-28 |
| Annual report to shareholders | ARS | 2002-05-09 | 2002-01-27 |
| Proxy statement | DEF 14A | 2002-05-07 | 2002-06-06 |
| Major company event | 8-K | 2002-04-24 | 2002-04-24 |
| Annual report | 10-K | 2002-04-09 | 2002-01-27 |
| Passive ownership stake (update) | SC 13G/A | 2002-03-11 | - |
| Major company event | 8-K | 2002-02-28 | 2002-02-28 |
| Passive ownership stake (update) | SC 13G/A | 2002-02-15 | - |
| Passive ownership stake (update) | SC 13G/A | 2002-02-14 | - |
| Passive ownership stake | SC 13G | 2002-02-14 | - |
| Passive ownership stake (update) | SC 13G/A | 2002-02-13 | - |
| Passive ownership stake (update) | SC 13G/A | 2002-02-11 | - |
| Major company event | 8-K | 2002-01-28 | 2002-01-25 |
| Annual report (amended) | 10-K/A | 2001-12-13 | 2001-01-28 |
| Quarterly report | 10-Q | 2001-12-11 | 2001-10-28 |
| Major company event | 8-K | 2001-09-21 | 2001-09-20 |
| Quarterly report | 10-Q | 2001-09-12 | 2001-07-29 |
| Passive ownership stake (update) | SC 13G/A | 2001-09-10 | - |
| 424B3 | - | 2001-09-04 | - |
| Passive ownership stake (update) | SC 13G/A | 2001-08-09 | - |
| 424B3 | - | 2001-07-24 | - |
| Major company event | 8-K | 2001-06-27 | 2001-06-26 |
| Quarterly report | 10-Q | 2001-06-14 | 2001-04-29 |
| Employee stock plan | S-8 | 2001-05-08 | - |
| Proxy statement | DEF 14A | 2001-05-04 | 2001-05-31 |
| Annual report | 10-K | 2001-04-27 | 2001-01-28 |
| Passive ownership stake (update) | SC 13G/A | 2001-04-20 | - |
| 424B3 | - | 2001-04-09 | - |
| 424B3 | - | 2001-03-13 | - |
| Passive ownership stake (update) | SC 13G/A | 2001-03-12 | - |
| Passive ownership stake | SC 13G | 2001-02-15 | - |
| Passive ownership stake | SC 13G | 2001-02-14 | - |
| Passive ownership stake | SC 13G | 2001-02-14 | - |
| Passive ownership stake | SC 13G | 2001-02-12 | - |
| Major company event | 8-K | 2001-01-05 | 2001-01-04 |
| 424B3 | - | 2000-12-18 | - |
| Quarterly report | 10-Q | 2000-12-13 | 2000-10-29 |
| 424B3 | - | 2000-12-11 | - |
| 424B3 | - | 2000-12-04 | - |
| Employee stock plan | S-8 | 2000-11-22 | - |
| 424B3 | - | 2000-11-20 | - |
| 424B3 | - | 2000-10-16 | - |
| 424B3 | - | 2000-10-02 | - |
| Quarterly report (amended) | 10-Q/A | 2000-09-25 | 2000-07-30 |
| 424B3 | - | 2000-09-18 | - |
| Quarterly report | 10-Q | 2000-09-14 | 2000-07-01 |
| 424B3 | - | 2000-09-05 | - |
| Major company event | 8-K | 2000-09-01 | 2000-08-31 |
| 424B3 | - | 2000-08-14 | - |
