|Season|Date|Driver|Team|Chassis|Engine|Race Distance Laps|Race Distance Miles (km)|Race Time|Average Speed (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 total honda engines were there?
Answer: 4