CUSIP: 984238105 Class: COM
Note: Option positions (PUT/CALL) are excluded.
| Period | Shares | Value ($000) | Average Close | Price Range |
|---|---|---|---|---|
| Q4 2012 | 26,200 | $75 | — | — |
| Q3 2012 | 25,900 | $48 | — | — |
| Q2 2012 | 25,700 | $51 | — | — |
| Q1 2012 | 25,900 | $48 | — | — |
| Q4 2011 | 26,600 | $44 | — | — |
| Q3 2011 | 26,000 | $48 | — | — |
| Q2 2011 | 24,500 | $69 | — | — |
| Q1 2011 | 24,000 | $63 | — | — |
| Q4 2010 | 25,000 | $58 | — | — |