So it seems to be a projection based on a presentation by the CEO of Microsoft that said the loss of potential revenue and growth is $3T in 2016 (note this is itself not actual measured impact but also a counter-factual projection).

In other words it's the most aggressive projection (ie: most sources note it as such) based on the most liberal definition possible of impact from a throwaway slide by a CEO. Then it's listed as the actual number and not a historical projection from half a decade ago.

https://www.smartcompany.com.au/technology/complacency-over-...