By the show's tenth anniversary in 1979, nine million American children under the age of six were watching Sesame Street daily, and several studies showed it was having a positive educational impact. The cast and crew expanded during this time, including the hiring of women in the crew and additional minorities in the cast. In 1981, the federal government withdrew its funding, so the CTW turned to other sources, such as its magazine division, book royalties, product licensing and foreign income.