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Is 0.000000490 zettabytes as much as The Ancestry.com's Census Records?

It's about nine-tenths as much as The Ancestry.com's Census Records
The amount of The Ancestry.com's Census Records is about 0.000000500 zettabytes.
(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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