Key PointsEnbridge has raised its dividend annually for 31 consecutive years.The midstream operator beat analysts' estimates for first-quarter earnings.The company isn't that affected by the high price of oil.10 stocks we like better than Enbridge › At first glance, Enbridge's first-quarter earnings, announced on May 8, shouldn't have been enough to keep the stock trading near its 52-week high. Enbridge (NYSE: ENB), a Canadian midstream energy c…