California-based companies received about 56 percent of all U.S. venture capital dollars in 2014, the state's highest share of venture activity since the dot com boom of the early 2000s. Over the past 15 years, investment activity has steadily become more concentrated in California and a few other states. In 2009, about 67 percent of all deals and 74 percent of venture capital dollars flowed to the top five states. By 2014, those states' share of venture dollars grew to 80 percent, according to NVCA/Pricewaterhouse Coopers data. A recent Harvard Business Review article, however, suggests that startups are receiving first-round funding in more metropolitan areas than ever.