| Major company event (amended) | 8-K/A | 2003-03-12 | 2003-03-11 |
| Activist ownership stake (update) | SC 13D/A | 2003-03-12 | - |
| Major company event | 8-K | 2003-03-11 | 2003-03-11 |
| Activist ownership stake (update) | SC 13D/A | 2003-02-20 | - |
| Passive ownership stake (update) | SC 13G/A | 2003-02-13 | - |
| Quarterly report | 10-Q | 2002-11-12 | 2002-09-30 |
| Major company event | 8-K | 2002-09-05 | 2002-09-05 |
| Quarterly report | 10-Q | 2002-08-14 | 2002-06-30 |
| Employee plan annual report | 11-K | 2002-06-26 | 2001-12-31 |
| Quarterly report | 10-Q | 2002-05-10 | 2002-03-31 |
| Proxy statement | DEF 14A | 2002-04-30 | 2002-06-06 |
| Annual report | 10-K | 2002-03-28 | 2001-12-31 |
| 424B1 | - | 2002-03-04 | - |
| Securities registration | S-3 | 2002-02-19 | - |
| Passive ownership stake (update) | SC 13G/A | 2002-02-12 | - |
| Passive ownership stake | SC 13G | 2002-02-11 | - |
| Quarterly report | 10-Q | 2001-11-13 | 2001-09-30 |
| Quarterly report | 10-Q | 2001-08-10 | 2001-06-30 |
| Employee plan annual report | 11-K | 2001-06-29 | 2000-12-31 |
| Quarterly report | 10-Q | 2001-05-11 | 2001-03-31 |
| Proxy statement | DEF 14A | 2001-04-30 | 2001-05-30 |
| 8-A12G/A | - | 2001-04-24 | - |
| Major company event | 8-K | 2001-04-24 | 2001-04-02 |
| Annual report | 10-K | 2001-04-02 | 2000-12-31 |
| Passive ownership stake (update) | SC 13G/A | 2001-02-14 | - |
| Passive ownership stake | SC 13G | 2001-02-13 | - |
| Passive ownership stake (update) | SC 13G/A | 2001-02-12 | - |
| Quarterly report | 10-Q | 2000-11-14 | 2000-09-30 |
| Major company event | 8-K | 2000-11-13 | 2000-10-09 |
| SC TO-I/A | - | 2000-09-28 | - |
| SC TO-I/A | - | 2000-09-14 | - |
| Major company event | 8-K | 2000-09-11 | 2000-09-07 |
| SC TO-I/A | - | 2000-09-07 | - |
| Quarterly report | 10-Q | 2000-08-14 | 2000-06-30 |
| SC TO-I | - | 2000-08-10 | - |
| Proxy statement | DEF 14A | 2000-06-28 | 2000-07-18 |
| Annual report (amended) | 10-K/A | 2000-06-27 | 1999-12-31 |
| Quarterly report | 10-Q | 2000-05-12 | 2000-03-31 |
| SC TO-I/A | - | 2000-05-11 | - |
| SC TO-I/A | - | 2000-05-02 | - |
| Annual report (amended) | 10-K/A | 2000-05-01 | 1999-12-31 |
| SC TO-I/A | - | 2000-04-18 | - |
| Annual report | 10-K | 2000-03-29 | 1999-12-31 |
| SC TO-I | - | 2000-03-21 | - |
| Major company event | 8-K | 2000-03-21 | 2000-03-06 |
| Activist ownership stake | SC 13D | 2000-03-06 | - |
| Passive ownership stake (update) | SC 13G/A | 2000-02-14 | - |
| Passive ownership stake (update) | SC 13G/A | 2000-02-09 | - |
| Passive ownership stake (update) | SC 13G/A | 2000-02-04 | - |
| Major company event | 8-K | 2000-02-02 | 2000-01-26 |
