We know that there are more than 500 Million people worldwide up on Facebook. But just how many die in one year? How many people are on facebook now, but won't be next year?

According to data from digital-legacy planning firm Entrustet, they compared Facebook usership data with average death rates from the Center for Disease Control, and discovered that this year, around 480,000 Facebook users may pass away in the U.S., and 1.78 million worldwide. Over ONE MILLION people on the social network this year, won't be logged-in by 2012.

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