At this rate, how much time would it take for the PSP to catch the DS in JP

[Fernando]

At this rate, how much time would it take for the PSP to catch the DS in JP?

At this rate, the PSP outselling the DS for an average of 10,000, it would take almost 25 years (or 1,200 weeks) to catch just the DS (currently in Japan: PSP 10 million and DS 22 million)

 

Is that correct?