WWDC 2011 Stats: The Best Figures From Apple's Huge Press Conference
#1: App store’s rank among software retailers
5,200: Number of developers at WWDC 2011
14 billion: Apps downloaded from store in its history
425,000: Apps in the app store
2.5 billion: Amount paid to developers building apps
130 million: Books downloaded iBooks store
225 million: Number of credit card accounts linked to iTunes store
15 billion: Songs sold from iTunes store
18 million: Songs offered in iTunes
