The application of personal data is forecast to deliver a potential €1 trillion ($1.3 trillion) annual economic benefit (roughly 8% of current GDP) to the EU-27 by 2020. Assuming personal data plays at least as large a role in the US economy as it does in that of the EU, personal has the potential to contribute an economic benefit to the US of $1.2 trillion over the same time period.
(Calculation for US by mLightenment based on data from Boston Consulting Group. 2012. The Value of Our Digital Identity.