vs.

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How much data have we collected?

- About 1.3 billion sessions since we shipped Office 2003 (each session contains all the data points over a certain fixed time period.)

- Over 352 million command bar clicks in Word over the last 90 days.

https://web.archive.org/web/20080324235838/http://blogs.msdn...

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I wish there were more recent studies on this, but they would paint the same picture