The Simpsons is the first television series still in production to receive this recognition. The stamps, designed by Matt Groening, were made available for purchase on May 7, 2009. Approximately one billion were printed, but only 318 million were sold, costing the Postal Service $1.2 million. Notes References Bibliography Further reading External links The Simpsons on Disney+ The Simpsons Archive The Simpsons on Metacritic The Simpsons on Rotten Tomatoes The Simpsons at Don Markstein's Toonopedia Archived from the original on June 4, 2017. 1989 American television series debuts 1980s American adult animated television series 1980s American animated comedy television series 1980s American satirical television series 1980s American sitcoms 1990s American adult animated television series 1990s American animated comedy television series 1990s American satirical television series 1990s American sitcoms 2000s American adult animated television series 2000s American animated comedy television series 2000s American satirical television series 2000s American sitcoms 2010s American adult animated television series 2010s American animated comedy television series 2010s American satirical television series 2010s American sitcoms 2020s American adult animated television series 2020s American animated comedy television series 2020s American satirical television series 2020s American sitcoms American adult animated comedy television series American adult animated television spin-offs American animated sitcoms American LGBT-related animated television series American television series with live action and animation Animated satirical television series Animated television series about dysfunctional families Annie Award winners Crossover animated television series Fictional families Fictional quintets Fox Broadcasting Company original programming English-language television shows Peabody Award-winning television programs Saturn Award-winning television series Self-reflexive television Television series based on comedy sketches Television series by 20th Century Fox Television Television series by Film Roman Television series by Fox Television Animation Television series by Gracie Films Television series by Klasky Csupo Television series by Rough Draft Studios Television series created by Matt Groening Television shows adapted into comics Television shows adapted into films Television shows adapted into video games Television shows featuring audio description Television shows set in the United States Television shows scored by Alf Clausen