Doubtful that you could get exact numbers or percentages. You can check their last financial conference call, but they don't always break down the numbers all the way. For instance, they might state laptop sales numbers, but won't break it down by model.
You can also try contacting apple using their public numbers... and contacting their public relations people or their shareholder relations people.
Wow, that's really interesting. How'd you find it? I wonder why iPod sales dropped so much. Or is it just that they see a surge around Christmas time? Or does everyone have iPods pretty much, so they're not selling new ones? Also interesting to see iPhone sales climb, then drop. So iPods are still clearly Apple's main product.
Let's not jump to conclusions: These numbers don't include the iPhone 3G yet. In addition to that, these numbers don't include iPhones of the first generation sold after the announcement of the iPhone 3G. A little bit of creative accounting by Apple.