Table:
text: List of GP2 Series drivers
By nationality
By nationality
Country Total_Drivers Champions Championships Current_September_22_2013 First_drivers Last_Current_drivers_September_22_2013
India 1 0 0 0 Karun Chandhok ( 2007 ) Karun Chandhok ( 2009 )
Indonesia 1 0 0 1 Rio Haryanto ( 2012 ) Rio Haryanto
Japan 5 0 0 0 Hiroki Yoshimoto ( 2005 ) Kamui Kobayashi ( 2009 )
Malaysia 1 0 0 0 Fairuz Fauzy ( 2005 ) Fairuz Fauzy ( 2011 )
Mexico 2 0 0 0 Sergio Pérez ( 2009 ) Esteban Gutiérrez ( 2012 )
Monaco 3 0 0 2 Clivio Piccione ( 2005 ) Stefano Coletti , Stéphane Richelmi
Netherlands 5 0 0 1 Yelmer Buurman ( 2008 ) Daniël de Jong
New Zealand 2 0 0 1 Brendon Hartley ( 2010 ) Mitch Evans

Question: How many champions were there among GP2 Series drivers when the first driver was Hiroki Yoshimoto (2005)?