| The SAS System |
| Obs | x | newx | newa | newb | newc |
| 1 | 4/16/02 | 15446 | 20020416 | 2002-04-16 | 16APR02 |
| 2 | 04/16/02 | 15446 | 20020416 | 2002-04-16 | 16APR02 |
| 3 | 5/6/02 | 15466 | 20020506 | 2002-05-06 | 06MAY02 |
| 4 | 5/06/02 | 15466 | 20020506 | 2002-05-06 | 06MAY02 |
| 5 | 12/1/02 | 15675 | 20021201 | 2002-12-01 | 01DEC02 |
| 6 | 12/01/02 | 15675 | 20021201 | 2002-12-01 | 01DEC02 |