For the full calendar year 2013, worldwide tablet shipments totaled 217.1 million units, which is up from 144.2 million units for the full year 2012 and represents a year-over-year growth rate of 50.6%.
Apple once again led the worldwide market for tablets, shipping 26 million units during the quarter, up from 14.1 million the previous quarter and 22.9 million in 4Q12. While the quarter represented the company's most successful on record, its year-over-year growth of 13.5% was well below the industry average. The numbers bring into focus the challenges the company faces as it attempts to grow its tablet business in markets outside of its traditional mature-market strongholds and in the face of continued success from competitors both large and small.
Apple saw its worldwide tablet market share for the quarter grow to 33.8%, up from 29.7% in the third quarter but down from its 38.2% share in the fourth quarter of 2012. Samsung retained its second-place spot on the strength of a wide portfolio of products and increased carrier support in markets like the U.S., grabbing an 18.8% share worldwide. That's down slightly from 18.9% the previous quarter, but up significantly from its 13% share a year ago. Rounding out the top five were Amazon (7.6%), ASUS (5.1%), and Lenovo (4.4%).