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235 zettabytes is about 400,000,000 times as much as The Ancestry.com's Census Records.
In other words, the amount of The Ancestry.com's Census Records is 0.00000000300 times that amount.
(2006 figures) (1790 to 1930 records only)
Updated in 2006 through a one-of-a-kind project, the genealogical research site Ancestry.com added 540 million names from records in the 1790 to 1930 US Census, capturing a total of 0.000000600 zettabytes of data. According to company estimates, the project took 6.6 million hours (750 person-years) to complete.
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