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:
| Driver | Team | Laps | Time/Retired | Grid | Points |
| --- | --- | --- | --- | --- | --- |
| Sébastien Bourdais | Newman/Haas Racing | 166.0 | 1:26:22.636 | 1.0 | 34.0 |
| Oriol Servià | Newman/Haas Racing | 166.0 | +0.312 secs | 2.0 | 28.0 |
| Jimmy Vasser | PKV Racing | 166.0 | +3.604 secs | 3.0 | 25.0 |
| Mario Domínguez | Forsythe Racing | 166.0 | +7.169 secs | 6.0 | 23.0 |
| Rodolfo Lavín | HVM Racing | 166.0 | +7.538 secs | 7.0 | 21.0 |
| Björn Wirdheim | HVM Racing | 166.0 | +7.555 secs | 5.0 | 19.0 |
| Alex Tagliani | Team Australia | 166.0 | +8.162 secs | 13.0 | 17.0 |
| Timo Glock | Rocketsports Racing | 165.0 | + 1 Lap | 15.0 | 16.0 |
| Marcus Marshall | Team Australia | 165.0 | + 1 Lap | 10.0 | 13.0 |
| Ryan Hunter-Reay | Rocketsports Racing | 165.0 | + 1 Lap | 16.0 | 11.0 |
| Justin Wilson | RuSPORT | 164.0 | + 2 Laps | 9.0 | 10.0 |
| Cristiano da Matta | PKV Racing | 164.0 | + 2 Laps | 4.0 | 9.0 |
| A. J. Allmendinger | RuSPORT | 163.0 | + 3 Laps | 8.0 | 8.0 |
| Andrew Ranger | Mi-Jack Conquest Racing | 162.0 | + 4 Laps | 17.0 | 7.0 |
| Ricardo Sperafico | Dale Coyne Racing | 161.0 | + 5 Laps | 18.0 | 6.0 |
| Nelson Philippe | Mi-Jack Conquest Racing | 127.0 | Contact | 11.0 | 5.0 |
| Paul Tracy | Forsythe Racing | 123.0 | Contact | 14.0 | 5.0 |
| Ronnie Bremer | Dale Coyne Racing | 41.0 | Pit Incident | 12.0 | 3.0 |
Question:
What is the biggest points when the grid is less than 13 and the time/retired is +7.538 secs?
Answer:
21.0