Mental retardation occurs in 2.5-3% of the general population. About 6-7.5 million mentally retarded individuals live in the United States alone. Mental retardation begins in childhood or adolescence before the age of 18.
The film was partially funded by Paramount Pictures and 20th Century Fox, its distributors. At the time, it was the most expensive film ever made, with an estimated budget of US$200 million. In 2009, James Cameron's Avatar (the first film Cameron had made since Titanic) topped Titanic, however. The film was originally scheduled to open on July 2, 1997; however, post-production delays pushed back its release to December 19 instead. Titanic was an enormous critical and commercial success.
Development of Avatar began in 1994, when Cameron wrote an 80-page treatment for the film. Filming was supposed to take place after the completion of Cameron's 1997 film Titanic, for a planned release in 1999, but according to Cameron, the necessary technology was not yet available to achieve his vision of the film.