| Passive ownership stake (update) | SC 13G/A | 2003-09-26 | - |
| Insider trade | 4 | 2003-09-25 | 2003-09-24 |
| Major company event | 8-K | 2003-09-18 | 2003-09-15 |
| Major company event | 8-K | 2003-07-31 | 2003-06-30 |
| Quarterly report | 10-Q | 2003-07-29 | 2003-06-30 |
| Employee plan annual report | 11-K | 2003-06-24 | 2002-12-27 |
| Quarterly report | 10-Q | 2003-04-30 | 2003-03-31 |
| Major company event | 8-K | 2003-04-29 | 2003-03-31 |
| Passive ownership stake (update) | SC 13G/A | 2003-04-24 | - |
| Proxy statement | DEF 14A | 2003-04-02 | 2003-12-31 |
| Annual report | 10-K | 2003-03-10 | 2002-12-31 |
| Major company event | 8-K | 2003-03-07 | 2003-03-07 |
| Passive ownership stake (update) | SC 13G/A | 2003-02-04 | - |
| Quarterly report | 10-Q | 2002-10-28 | 2002-09-30 |
| Major company event | 8-K | 2002-08-14 | 2002-05-14 |
| 11-K/A | - | 2002-08-08 | 2001-12-27 |
| Quarterly report | 10-Q | 2002-07-25 | 2002-06-30 |
| Employee plan annual report | 11-K | 2002-06-25 | 2001-12-27 |
| Major company event (amended) | 8-K/A | 2002-05-21 | 2002-05-21 |
| Major company event | 8-K | 2002-05-17 | 2002-05-17 |
| Quarterly report | 10-Q | 2002-04-30 | 2002-03-31 |
| Proxy statement | DEF 14A | 2002-04-02 | 2002-12-31 |
| 10-K405 | - | 2002-03-06 | 2001-12-31 |
| Passive ownership stake (update) | SC 13G/A | 2002-02-04 | - |
| Quarterly report | 10-Q | 2001-10-31 | 2001-09-30 |
| Quarterly report | 10-Q | 2001-07-31 | 2001-06-30 |
| Employee plan annual report | 11-K | 2001-06-26 | 2000-12-31 |
| Quarterly report | 10-Q | 2001-05-01 | 2001-03-31 |
| Proxy statement | DEF 14A | 2001-04-03 | 2001-12-31 |
| 10-K405 | - | 2001-03-08 | 2000-12-31 |
| Passive ownership stake (update) | SC 13G/A | 2001-02-20 | - |
| Quarterly report | 10-Q | 2000-10-27 | 2000-09-30 |
| Quarterly report | 10-Q | 2000-07-27 | 2000-06-30 |
| Employee plan annual report | 11-K | 2000-06-26 | 1999-12-27 |
| Quarterly report | 10-Q | 2000-05-03 | 2000-03-31 |
| Proxy statement | DEF 14A | 2000-04-04 | 2000-12-31 |
| 10-K405 | - | 2000-03-15 | 1999-12-31 |
| Passive ownership stake | SC 13G | 2000-03-13 | - |
| Passive ownership stake (update) | SC 13G/A | 2000-02-10 | - |
| Employee stock plan | S-8 | 1999-12-09 | - |
| Quarterly report | 10-Q | 1999-10-29 | 1999-09-30 |
| Quarterly report | 10-Q | 1999-08-13 | 1999-06-30 |
| Major company event | 8-K | 1999-06-01 | 1999-05-26 |
| Quarterly report (amended) | 10-Q/A | 1999-05-12 | 1999-03-31 |
| Quarterly report | 10-Q | 1999-05-12 | 1999-03-31 |
| Proxy statement | DEF 14A | 1999-04-09 | 1999-12-31 |
| 10-K405 | - | 1999-03-22 | 1998-12-31 |
| Passive ownership stake | SC 13G | 1999-03-12 | - |
| Passive ownership stake (update) | SC 13G/A | 1999-01-29 | - |
| Passive ownership stake (update) | SC 13G/A | 1999-01-29 | - |
