When did the digital age begin?

Did you ever wonder when the digital age actually begun. Well according to Martin Hilbert and Priscila Lopez it began in the year 2002.
Hilbert and Lopez did a study which they published in the August 2012 issue of "Signifigance, statistics making sence".
Over the course of five years they inventoried analog mediums like paper, vinyl and digital storage products. After completing their research they determined that in 2002 more data was stored in digital format than any other analog form.
I hope they got paid well for that study. Seems a bit bit boring to me.

Ref: Hilbert, M & Lopez, P. (August 2012) "How Much Information is there in the information society", Signifigance, statistics making sence, August 2012 volume 9, issue 4, pg.8