| Sample Number/Rotation Group | |||||
|---|---|---|---|---|---|
| Year/Month | A72 | A73 | A74 | A75 | A76 |
| 1998 | |||||
| JAN | - - 3 4 5 6 - - | - - - - - - 7 8 | 1 2 | ||
| FEB | - - - 4 5 6 7 - | - - - - - - - 8 | 1 2 3 | ||
| MAR | - - - - 5 6 7 8 | - - - - - - - - | 1 2 3 4 | ||
| APR | - - - - - 6 7 8 | 1 - - - - - - - | - 2 3 4 5 | ||
| MAY | - - - - - - 7 8 | 1 2 - - - - - - | |||
| JUNE | - - - - - - - 8 | 1 2 3 - - - - - | |||
| JULY | - - - - - - - - | 1 2 3 4 - - - - | |||
| AUG | - - - - - - - - | - 2 3 4 5 - - - | 1 | ||
| SEPT | - - - - - - - - | - - 3 4 5 6 - - | - - - - - - 7 8 | 1 2 | |
| OCT | - - - - - - - - | - - - 4 5 6 7 - | - - - - - - - 8 | 1 2 3 | |
| NOV | - - - - - - - - | - - - 5 6 7 8 - | - - - - - - - - | 1 2 3 4 | |
| DEC | - - - - - - - - | - - - - 6 7 8 - | 1 - - - - - - - | - 2 3 4 5 | |
| 1999 | |||||
| JAN | - - - - - - - - | - - - - - - 7 8 | 1 2 - - - - - - | - - 3 4 5 6 | |
| FEB | - - - - - - - - | - - - - - - - 8 | 1 2 3 - - - - - | - - - 4 5 6 7 | |
| MAR | - - - - - - - - | - - - - - - - - | 1 2 3 4 - - - - | - - - - 5 6 7 8 | |
| APR | - - - - - - - - | - - - - - - - - | - 2 3 4 5 - - - | - - - - - 6 7 8 | 1 |
| MAY | - - - - - - - - | - - - - - - - - | - - 3 4 5 6 - - | - - - - - - 7 8 | 1 2 |
| JUNE | - - - - - - - - | - - - - - - - - | - - - 4 5 6 7 - | - - - - - - - 8 | 1 2 3 |
| JULY | - - - - - - - - | - - - - - - - - | - - - - 5 6 7 8 | - - - - - - - - | 1 2 3 4 |
| AUG | - - - - - - - - | - - - - - - - - | - - - - - 6 7 8 | 1 - - - - - - - | - 2 3 4 5 |
| SEPT | - - - - - - - - | - - - - - - - - | - - - - - - 7 8 | 1 2 - - - - - - | - - 3 4 5 6 |
| OCT | - - - - - - - - | - - - - - - - - | - - - - - - - 8 | 1 2 3 - - - - - | - - - 4 5 6 7 |
| NOV | - - - - - - - - | - - - - - - - - | - - - - - - - - | 1 2 3 4 - - - - | - - - - 5 6 7 8 |
Note: This is an adapted version of CPS rotation chart for 1998 and 1999 demonstrating the TUS-CPS 1998-1999 yearly sample. The sample and rotation groups for the TUS-CPS sample months (September 1998, January 1999, and May 1999) are bolded. The rotation chart shows when to interview the sample units for a particular sample designation and rotation. A sample designation is represented by the letter “A” and a two-digit number. Each sample designation consists of rotations numbered 1 through 8. Each month, a new sample/rotation comes into sample for the first time, and another sample/rotation returns to sample after an eight-month lapse. Figure shows that the 24 sample/rotation groups introduced “between” A73 group 3 and A76 group 2 were in sample exactly once in these 3 TUS-CPS monthly samples – demonstrating the efficiency of selecting every fourth month.