I found this interesting infographic showing that there were 1.8 zettabytes of data last year, and it will quadruple by 2015. Also, it shows that the high demand of data scientists by 2018.
“Unless you’ve been living under a rock, you’ve surely become familiar with or at least heard of the buzzwords “Big Data” and “Predictive Analytics.” These terms address the growing data that is created every moment by tweets, likes, diggs, shares, and every other interaction occurring across the digital sphere. The data is both overwhelming and ripe with potential business insights, but what does that mean the future? What ways is this vast amount of data growing?”
If you like this infograph, then you can see others like it here.