There are three Ampelmännchen variations in modern-day Germany – the old East German version, the old West German version, and a pan-German Ampelmännchen that was introduced in 1992. Each German state holds the right to determine the version used.  East Germans have changed the look of Ampelmännchen traffic lights as a joke since the early 1980s; this turned into media-effective efforts to call attention to the vanishing East German Ampelmännchen in the 1990s.  The Ampelmännchen on several traffic lights in Erfurt were changed through manipulation of the template, showing Ampelmännchen carrying backpacks or cameras.  In 2004, Joachim Rossberg invented the female counterpart to the Ampelmännchen, the Ampelfrau , which was installed on some traffic lights in Zwickau ,  Dresden  and Fürstenwalde .