Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Year | Title | Role | Notes |
| --- | --- | --- | --- |
| 1978 | Things We Did Last Summer | Paul Oberon | TV Movie |
| 1979 | Working Stiffs | Heimlich | 3 episodes |
| 1980 | The Flintstone Comedy Hour | Freaky Frankenstone | Voice\nEpisode: "RV Fever/Birthday Boy/Clownfoot/Fred Goes Ape/Flying Mouse/Ghost-sitters" |
| 1980 | Steve Martin: Comedy Is Not Pretty | Unnamed Terrorist | Reubens played an unnamed terrorist that shoplifted nuclear weapons fuel from a convenience store in a skit in this Steve Martin comedy special. |
| 1980 | Steve Martin: All Commercials | Multiple Roles | Reubens played multiple roles in multiple skits in this Steve Martin comedy special. |
| 1981 | Mork & Mindy | Dickie Nimitz | Episode: "Long Before We Met" |
| 1981 | The Pee-wee Herman Show | Pee-wee Herman | TV Movie |
| 1982 | Madame's Place | Pee-Wee Herman | Episode: "Episode #1.34" |
| 1984 | Faerie Tale Theatre | Pinocchio | Episode: "Pinocchio" |
| 1985 | Saturday Night Live | Pee-wee Herman | Host\nEpisode: "Pee-wee Herman/Queen Ida & The Bon Temps Zydeco Band" |
| 1986–1990 | Pee-wee's Playhouse | Pee-wee Herman | Creator, writer, director of 3 episodes\nDaytime Emmy Award for Outstanding Achievement in Art Direction/Set Direction/Scenic Design (1988)\nDaytime Emmy Award for Outstanding Achievement in Graphics and Title Design (1991)\nNominated - Daytime Emmy Award for Outstanding Performer in Children's Programming (1987, 1988, 1990, 1991)\nNominated - Daytime Emmy Award for Outstanding Children's Series (1987, 1990, 1991)\nNominated - Daytime Emmy Award for Outstanding Directing in Children's Programming (1988, 1990, 1991)\nNominated - Daytime Emmy Award for Outstanding Achievement in Art Direction/Set Decoration/Scenic Design (1989, 1990, 1991)\nNominated - Daytime Emmy Award for Outstanding Writing in a Children's Series (1987, 1988) |
| 1988 | Sesame Street | Pee-wee Herman | Episode:"Put Down the Duckie" |
| 1995–1997 | Murphy Brown | Andrew J. Lansing III | 6 episodes\nNominated - Primetime Emmy Award for Outstanding Guest Actor in a Comedy Series (1995) |
| 2000 | Everyone Loves Raymond | Russell | Episode: "Hackidu" |
| 2001 | Ally McBeal | Louis | Episode: "Cloudy Skies, Chance of Parade" |
| 2002 | Rugrats | Hermie the Elf | Voice\nEpisode: "Babies in Toyland" |
| 2005 | Tripping the Rift | God\nDevil | Voice\nEpisode: "Chode's Near Death-Experience" |
| 2006 | Campus Ladies | Drama instructor | Episode: "Drama Class" |
| 2006 | Reno 911! | Rick | Episode: "Rick's On It" |
| 2006 | Tom Goes to the Mayor | Paul | Voice\nEpisode: "Puddins" |
| 2006 | Re-Animated | Golly Gopher | Voice\nTV Movie |
| 2007 | Area 57 | Alien | Unaired pilot |
| 2007 | 30 Rock | Gerhardt Hapsburg | Episode: "Black Tie" |
| 2007 | Dirt | Chuck Lafoon | 3 episodes |
| 2007 | Tim and Eric Awesome Show, Great Job! | The Moon | Episode: "Cats" |
| 2007-2009 | Chowder | Reuben | Voice\n3 episodes |
| 2007 | Pushing Daisies | Oscar Vibenius | 2 episodes |
| 2009-2011 | Batman: The Brave and the Bold | Bat-Mite | Voice\n4 episodes |
| 2010 | Adventure Time | Gnome Ruler | Voice\nEpisode: "Power Animal" |
| 2011 | The Pee-wee Herman Show | Pee-wee Herman | TV Movie\nNominated - Primetime Emmy Award for Outstanding Variety, Music or Comedy Special |
| 2012–2013 | Tron: Uprising | Pavel | Voice\n17 episodes |
| 2012 | Robot Chicken DC Comics Special | The Riddler | Voice\nTV Movie |
| 2013 | Comedy Bang! Bang! | Pee-wee Herman | Episode: "Pee Wee Herman Wears a Halloween Costume" |
Question:
how many years did pee-wee's playhouse run on television?
Answer:
4