Apple will start selling two new iPhone models on Friday. It is likely to refresh its iPad lineup later in the year. Here are details on the number of iPhones and iPads that Apple shipped in recent quarters, with percentage change from same period a year earlier.

Quarter ending June 29, 2013: 31.2 million iPhones (up 20 percent), 14.6 million iPads (down 14 percent)

Quarter ending March 30, 2013: 37.4 million iPhones (up 7 percent), 19.5 million iPads (up 65 percent)

Quarter ending Dec. 29, 2012: 47.8 million iPhones (up 29 percent), 22.9 million iPads (up 49 percent)

Quarter ending Sept. 29, 2012: 26.9 million iPhones (up 58 percent), 14.0 million iPads (up 26 percent)

Quarter ending June 30, 2012: 26.0 million iPhones (up 28 percent), 17.0 million iPads (up 84 percent)

Quarter ending March 31, 2012: 35.1 million iPhones (up 88 percent), 11.8 million iPads (increase of about 2.5 times)

Quarter ending Dec. 31, 2011: 37 million iPhones (more than double), 15.4 million iPads (more than double)