According to Susanna Kim of ABC News, between 1910 and 2010, dividend yield and dividend growth represented 90% of stockholders' nominal returns. Dividends really are the "X factor" that can alter your retirement and investing strategy, allowing you to use this "free money" and time to compound your gains.

While dividend stocks themselves can be a dime a dozen, finding quality companies that have sustainable, growing, and meaningful payouts can often be a challenge. It's even more difficult for health care-focused investors since so few companies within the sector offer a regularly growing dividend.

Today, we're going to look at five Dividend Aristocrats which are considered to the be the cream of the crop within the health care sector. We'll examine what makes these stocks tick and why Medtronic (NYSE:MDT), Walgreen (NASDAQ:WBA), Abbott Laboratories (NYSE:ABT), Becton, Dickinson (NYSE:BDX), and Johnson & Johnson (NYSE:JNJ) should be on every income investors' radar.

Sean Williams has no material interest in any companies mentioned in this article. You can follow him on CAPS under the screen name TMFUltraLong, track every pick he makes under the screen name TrackUltraLong, and check him out on Twitter, where he goes by the handle @TMFUltraLong.

The Motley Fool owns shares of, and recommends Johnson & Johnson. It also owns shares of Medtronic and recommends Becton, Dickinson. Try any of our Foolish newsletter services free for 30 days. We Fools don't all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.