The number of arcade units sold had tripled to 400,000 by 1982, receiving an estimated total of between seven billion coins and . "Pac-Man" themed merchandise sales had also exceeded $1 billion. In a 1983 interview, Nakamura said that though he did expect "Pac-Man" to be successful, "I never thought it would be this big." "Pac-Man" is the best-selling arcade game of all time (surpassing "Space Invaders"), with total estimated earnings ranging from coins and $3.5 billion ($7.7 billion adjusted for inflation) to ( adjusted for inflation) in arcades.