Table:
text: GP2 Series
Champions
Champions
Season Champion Second_ Third Team_Champion
2005 Nico Rosberg ( ART Grand Prix ) Heikki Kovalainen ( Arden International ) Scott Speed ( iSport International ) ART Grand Prix
2006 Lewis Hamilton ( ART Grand Prix ) Nelson Piquet, Jr. ( Piquet Sports ) Alexandre Prémat ( ART Grand Prix ) ART Grand Prix
2007 Timo Glock ( iSport International ) Lucas di Grassi ( ART Grand Prix ) Giorgio Pantano ( Campos Grand Prix ) iSport International
2008 Giorgio Pantano ( Racing Engineering ) Bruno Senna ( iSport International ) Lucas di Grassi ( Barwa Int. Campos Team ) Barwa International Campos Team

Question: What was the highest season of the GP2 series with Barwa International Campos Team as champions?