As the soft drinks industry tries to recover from a long slide, Coca-Cola Co. has new bragging rights in its rivalry with PepsiCo.

Diet Coke passed Pepsi-Cola in sales last year to become the second-largest soft drink in America, trade journal Beverage Digest says. That gives Coca-Cola the top two soft drinks for the first time since Beverage Digest has compiled market share data.

Sales of Coca-Cola and Diet Coke dipped by half a percentage point and one point, respectively, in 2010. But sales of Pepsi-Cola fell 4.8 percent.

Beyond the sales decline, Credit Suisse analyst Carlos Laboy said he worries about the "morale implications for PepsiCo's beverage people" of seeing the company's core soft drink drop to No. 3.

Sarah Walraven, who lives in Paulding County, drinks Diet Coke instead of coffee in the morning. She picked up the habit in college. The diet version was an acquired taste at first.

"Now, I can't stand the taste of regular (Coke)," said Walraven, 24. "There's no turning back."

Soft drink companies need more devoted fans like Walraven. Sales shrank for the sixth straight year, although the decline was less dramatic than in 2009, according to Beverage Digest. Texas-based Dr Pepper Snapple Group and Coca-Cola both took market share from PepsiCo.

The Coca-Cola brand accounted for 17 percent of the nation's soft-drink sales last year, followed by Diet Coke's 9.9 percent and Pepsi-Cola's 9.5 percent. Rounding out the top five: Mountain Dew at 6.8 percent and Dr Pepper at 6.3 percent.

With the volume declines of the last six years, the category is roughly the size it was in 1996, according to Beverage Digest.

PepsiCo still has large beverage brands, despite the shrinkage of Pepsi-Cola. Mountain Dew is the No. 4 soft drink brand, and Diet Mountain Dew, the eighth-largest, was the top performer among big soft drink brands last year. It had sales growth of 5.8 percent.

Diet beverages -- including the fast-growing Diet Mountain Dew, Diet Dr Pepper and Coke Zero -- now represent 30 percent of the soft drink business, according to Beverage Digest.