 Complete the following phrase:  For the 2006 season, over 80 of the field began the season with a Dallara, a possible symptom of Panoz manufacturer of the G-Force chassiss perceived lack of interest. This was around the time Panoz began delivering the DP01 chassis to the rival Champ Car series. From 2007 to 2011 all IndyCar teams used the Dallara IR-05 chassis, although a few teams entered a PanozG-Force chassis into the 