How many copies did Green day dookie sell?

Green Day's album "Dookie," released in 1994, has sold over 10 million copies in the United States alone, earning it a Diamond certification from the RIAA. Worldwide, it is estimated to have sold over 20 million copies, making it one of the best-selling albums of all time. The album played a significant role in bringing punk rock into mainstream popularity during the 1990s.