In Apple's last earnings call, it was announced that 20 million iPhones had been sold in Q3 of 2011 alone. Apple has overtaken Nokia as the world's leading smartphone vendor, and a recent report also places Apple as the top smartphone manufacturer in the US.
With the iPhone's seemingly unstoppable growth rate, it's not a surprise that Apple's 5 year old smartphone now sees a 141.8% year-over-year increase in market share.