The United States Postal Service issued a set of five 44 cent stamps featuring the cartoon characters The Simpsons on 7th May. The stamps were drawn by Matt Groening and the post office had a billion copies printed. A special postmark was used on mail posted at Springfield on the first day of issue. U.S. Postal Service vice president said “We are looking to encourage a younger generation to develop an interest in stamp collecting by creating stamps that they can relate to.”