There are an estimated five million flex-fuel vehicles but only about 500 E85 fuel stations and most of those in the corn belt.

NPR: 'Flex-Fuel' Concept Fails to Deliver on Potential

The company has a total of five dailies, but the Times of India and The Economic Times of India are the largest, with an estimated print circulation of around five million.

FORBES: Tech Savvy & Richer India Turns Daily News Sites Into World Leaders

It means despite the ageing population the numbers getting help has actually fallen in the past five years, leaving an estimated one million without any help.

BBC: Why the elderly care crisis is here to stay

The tree-lined space, which receives an estimated eight million annual visitors, is being divided into five zones for the festivities.

BBC: Vancouver��s big birthday bash

More than 200 million iPhones have been sold since Apple first launched the device five years ago, and there are an estimated 170 million iPhone users across the world.

CNN: Apple design chief: We nearly scrapped iPhone

With an estimated 100 million cell phones retired annually in the U.S. and five times that many collecting dust, ReCellular's biggest challenge is keeping up.

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An estimated 30 million households had a vegetable garden in 2011, a 20% increase over five years earlier, according to the nonprofit National Gardening Association, in Burlington, Vt.

WSJ: Who Put Lettuce in My Daffodils?