iPod sales growth over the years

In 2002, Apple sold nearly as many iPods in its winter quarter (219,000) as it did the first three quarters.
In 2003, Apple actually sold more iPods in its winter quarter (733,000) than in the first three combined.
In 2004, Apple again sold more iPods in its final quarter (4,580,000) than in the first three.
In 2005, Apple maintained sales of more than 4 million iPods in every quarter. In the winter quarter, it still blew out nearly 3 times as many: 14,480,000.
This year, Apple maintained iPod sales of more than 8 million in each of the first three quarters of the year.