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:
| Season | Date | Driver | Team | Chassis | Engine | Race Distance\nLaps | Race Distance\nMiles (km) | Race Time | Average Speed\n(mph) | Report |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 2005 | July 17 | Sébastien Bourdais | Newman/Haas Racing | Lola | Ford-Cosworth | 88 | 173.624 (279.42) | 1:38:55 | 105.302 | Report |
| 2006 | July 23 | Justin Wilson | RuSPORT | Lola | Ford-Cosworth | 85 | 167.705 (269.895) | 1:40:30 | 100.112 | Report |
| 2007 | July 22 | Sébastien Bourdais | Newman/Haas/Lanigan Racing | Panoz | Cosworth | 96 | 189.408 (304.822) | 1:45:41 | 107.517 | Report |
| 2008 | July 26 | Scott Dixon | Chip Ganassi Racing | Dallara | Honda | 91* | 179.543 (288.946) | 1:51:06 | 96.967 | Report |
| 2009 | July 26 | Will Power | Penske Racing | Dallara | Honda | 95 | 187.435 (301.647) | 1:42:42 | 109.498 | Report |
| 2010 | July 25 | Scott Dixon | Chip Ganassi Racing | Dallara | Honda | 95 | 187.435 (301.647) | 1:50:37 | 101.666 | Report |
| 2011 | July 24 | Will Power | Penske Racing | Dallara | Honda | 80 | 180.48 (290.454) | 1:57:23 | 90.949 | Report |
| 2012 | July 22 | Hélio Castroneves | Penske Racing | Dallara | Chevrolet | 75 | 169.2 (272.301) | 1:38:51 | 101.246 | Report |
Question:
how many different teams are represented in the table?
Answer:
4