Source,2001,2002,2003,2004,2005,2006,2007,2008,2009,2010
Television,74,82,80,74,73,72,74,70,70,66
Newspaper,45,42,50,46,36,36,34,35,32,31
Internet,13,14,20,24,20,24,24,40,35,41
Radio,18,21,18,21,16,14,13,18,17,16