For over a decade, these two drugmakers consistently outperformed the benchmark index and could do it again.Investors looking for stocks that can reliably outperform the broad market should have a look at the pharmaceutical industry. The tailwind pushing them forward is powerful. In the U.S., around 10,000 people become eligible for Medicare each week.The U.S. is one of many developed countries with an aging population that's increasingly dependent on prescription drugs. This is how AbbVie (ABBV -0.26%) and ...