The title is "60% of Top 25 Tech Companies Founded By 1st & 2nd Generation Americans = 1.3MM Employees, 2012". It was created to support a thesis (immigrants found highly successful companies at a higher rate than their share of the population suggests), but it presents an incomplete data set. Either the authors are naive and didn't understand how misleading the chart was, or they chose to structure it that way to support their agenda. It's so wildly misleading that it makes the rest of their "data" suspect.