Table:
text: Jon Stewart
Filmography
Television
Year_ Title Role_ Notes_
2002 44th Annual Grammy Awards Host TV Special
2002 Saturday Night Live Host Episode: Jon Stewart/India.Arie
2006 78th Academy Awards Host TV Special
2006 American Dad Himself Voice, Episode: Irregarding Steve
2007 Jack`s Big Music Show Brunk Stinegrouber Episode: Groundhog Day
2008 The Simpsons Himself Voice, Episode: E Pluribus Wiggum
2008 80th Academy Awards Host TV Special
2012 Robot Chicken Matt Trakker, Serpentor Voice, Episode: Executed by the State
2013 Big Time Rush Himself Episode: Big Time Invasion

text: Jon Stewart
Filmography
Television
Year_ Title Role_ Notes_
1989–1993 Short Attention Span Theater Host Co-Presented four seasons
1993–1995 The Jon Stewart Show Host Creator, Executive producer, Writer
1996 The Larry Sanders Show Himself 6 episodes from 1996-1998
1997 The Nanny Bobby Episode: Kissing Cousins
1997 NewsRadio Andrew Episode: Twins
1997 Dr Katz, Professional Therapist Jon Voice, Episode Guess Who
1997 Space Ghost Coast to Coast Himself Episode: Mayonnaise
1997 Mr. Show Himself Episode: A White Man Set Them Free
1998 Elmopalooza Himself TV Special
1999 Spin City Parker Episode: Wall Street
1999–present The Daily Show Host Executive producer, Writer
2001 43rd Annual Grammy Awards Host TV Special

Question: How many more roles did Jon Stewart have in 1997 compared to 2007?