Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Player | Overs | Runs | Wkts | Mdns | Econ |
| --- | --- | --- | --- | --- | --- |
| WPUJC Vaas | 88 | 331 | 23 | 14 | 3.76 |
| B Lee | 83.1 | 394 | 22 | 9 | 4.73 |
| GD McGrath | 87 | 310 | 21 | 18 | 3.56 |
| Z Khan | 88.2 | 374 | 18 | 5 | 4.23 |
| SE Bond | 78 | 305 | 17 | 12 | 3.91 |
| M Muralitharan | 87.4 | 319 | 17 | 7 | 3.63 |
| AJ Bichel | 57 | 197 | 16 | 7 | 3.45 |
| VC Drakes | 51.5 | 208 | 16 | 7 | 4.01 |
| J Srinath | 91.1 | 369 | 16 | 4 | 4.04 |
| A Nehra | 69.1 | 289 | 15 | 9 | 4.17 |
| Source: Cricinfo.com | Source: Cricinfo.com | Source: Cricinfo.com | Source: Cricinfo.com | Source: Cricinfo.com | Source: Cricinfo.com |
Question:
Tell me the wkts for econ of 4.23
Answer:
18.0