Google has unveiled a new search function that will make it easier to compare statistics such as unemployment rates or carbon emissions.

Google product manager Ola Rosling said in a blog:"The data we're including in this first launch represents just a small fraction of all the interesting public data available on the web."

Rosling also said the data comes from the US Bureau of Labor Statistics and the US Census Bureau's Population Division, indicating that much of the function is only relevant to the US at the moment.

"Reliable information about these kinds of things exists thanks to the hard work of data collectors gathering countless survey forms, and of careful statisticians estimating meaningful indicators that make hidden patterns of the world visible to the eye. They did the hard work! We just made the data a bit easier to find and use."

According to Rosling, to get this kind of statistical information users should type in terms like ‘unemployment rate' or ‘carbon emissions' and then the state or county.

That can pull up the most recent estimates in a Google interactive chart and then users can add or remove data based on different geographical areas.

The new feature includes technology Google acquired when it bought the Trendalyzer graphics software two years ago.

"We have been working on creating a new service that makes lots of data instantly available for intuitive, visual exploration," she said. "Today's launch is a first step in that direction."

Last week, Google unveiled two new tools that are designed to make it easier for users to find the information - or images - they're looking for. Both of the new tools - Google News Timeline and Image Search - came out of Google Labs.