Enbridge has steadily grown its cash flow and dividend over the past five years.Enbridge (ENB +0.29%) is one of North America's largest energy infrastructure companies. It transports about 30% of the crude oil produced on the continent and almost 20% of the natural gas consumed in the U.S. The Canadian company also operates the largest natural gas utility by volume and is a leading investor in renewable energy. Here's a look at what this leading pipeline and utility stock has done for investors over the pas ...