CHART OF THE DAY: The Decline Of The Mac

Mac shipments dropped 22 percent during the December 2012 quarter, marking their biggest decline in about 10 years, Dan Frommer of SplatF reports.

Apple shipped 778,000 fewer Macs in 2012 than it did in 2011, while it had 43 million more iPhones and 25 million more iPads, respectively.

CEO Tim Cook attributes the slowdown of Mac shipments to the release of the new iMacs late in the quarter and low inventory, but the drop could also be explained by the overall decline of the PC market and the rise of tablets.

Despite the low Mac sales, Apple's "computer" business has never been stronger. Check out the chart by Frommer showing combined Mac and iPad sales.