| Passive ownership stake (update) | SC 13G/A | 2001-02-12 | - |
| Passive ownership stake (update) | SC 13G/A | 2001-02-06 | - |
| Passive ownership stake | SC 13G | 2001-02-02 | - |
| Proxy materials | DEFA14A | 2001-01-12 | - |
| Employee stock plan | S-8 | 2001-01-08 | - |
| Annual report | 10-K | 2000-12-21 | 2000-09-30 |
| Proxy statement | DEF 14A | 2000-12-21 | 2000-01-26 |
| Major company event | 8-K | 2000-10-13 | 2000-10-02 |
| Quarterly report | 10-Q | 2000-08-11 | 2000-06-30 |
| Quarterly report | 10-Q | 2000-05-15 | 2000-03-31 |
| Passive ownership stake (update) | SC 13G/A | 2000-02-14 | - |
| Quarterly report | 10-Q | 2000-02-11 | 1999-12-31 |
| Passive ownership stake | SC 13G | 2000-02-03 | - |
| Passive ownership stake (update) | SC 13G/A | 2000-01-18 | - |
| Proxy statement | DEF 14A | 1999-12-29 | 2000-01-26 |
| Annual report | 10-K | 1999-12-29 | 1999-09-30 |
| Major company event (amended) | 8-K/A | 1999-08-18 | 1998-07-29 |
| Quarterly report | 10-Q | 1999-08-16 | 1999-06-30 |
| Quarterly report (amended) | 10-Q/A | 1999-08-16 | 1999-03-31 |
| Quarterly report (amended) | 10-Q/A | 1999-08-16 | 1998-12-31 |
| Annual report (amended) | 10-K/A | 1999-08-16 | 1998-09-30 |
| RW | - | 1999-08-03 | - |
| Quarterly report | 10-Q | 1999-05-17 | 1999-03-31 |
| Passive ownership stake (update) | SC 13G/A | 1999-03-10 | - |
| Quarterly report | 10-Q | 1999-02-16 | 1998-12-31 |
| Passive ownership stake (update) | SC 13G/A | 1999-02-12 | - |
| 8-A12G/A | - | 1999-02-05 | - |
| Passive ownership stake | SC 13G | 1999-01-19 | - |
| Proxy statement | DEF 14A | 1999-01-11 | 1999-01-27 |
| POS AM | - | 1998-12-31 | - |
| 10-K405 | - | 1998-12-29 | 1998-09-30 |
| Major company event | 8-K | 1998-11-20 | 1998-11-19 |
| Major company event (amended) | 8-K/A | 1998-10-27 | 1998-07-29 |
| Major company event | 8-K | 1998-09-11 | 1998-09-10 |
| Major company event | 8-K | 1998-09-04 | 1998-09-03 |
| S-8 POS | - | 1998-08-21 | - |
| S-8 POS | - | 1998-08-21 | - |
| S-3/A | - | 1998-08-20 | - |
| Securities registration | S-3 | 1998-08-13 | - |
| Major company event | 8-K | 1998-08-12 | 1998-07-29 |
| Quarterly report | 10-Q | 1998-08-10 | 1998-06-30 |
| Major company event | 8-K | 1998-07-23 | 1998-07-08 |
| Employee stock plan | S-8 | 1998-06-26 | - |
| Major company event | 8-K | 1998-06-25 | 1998-06-10 |
| 8-A12G | - | 1998-06-25 | - |
| Quarterly report | 10-Q | 1998-04-30 | 1998-03-31 |
| Quarterly report | 10-Q | 1998-02-12 | 1997-12-31 |
| Passive ownership stake (update) | SC 13G/A | 1998-01-30 | - |
| Proxy statement | DEF 14A | 1997-12-29 | 1998-01-28 |
| Annual report | 10-K | 1997-12-29 | 1997-09-30 |
