Google Docs will be used by 30% (or 6%) a year from now

Google does not publish usage statistics of its Docs suite of applications. So it became a guessing game. The best summary I was able to find is
http://www.dullest.com/blog/google-docs-marketshare/
Matt Cutts compares data from 3 sources: compete.com, ClickStream, and Wakoopa .
Wakoopa cought my eye because the way Matt used it allows periodical re-gathering of numbers. One could plot a trend line here.

So I did. I have quickly written such calculator and followed numbers for about a week. In november 2008, as Matt reported, it was 5%. In May, I calculated it was 15%.
From one week of observations of how the numbers change, the numbers suggest it will be 30% a year from now, following the same measuring technique.
The results are published by me using, obviously, Google Spreadsheet:
http://spreadsheets.google.com/pub?key=rvaDvIdh6E8qqluzLDpo5yw&gid=0

Matt compared the numbers from 3 sources and they differ. The reasons are in measurement methodology and audience of choice. ClickStream numbers were fifth of Wakoopa's. Preserving this ratio will mean that in a year from now ClickStream would report 6% market share for Google Docs.

My take: 6% or 30%, it is a lot. Watching Wakoopa numbers convinced me that online office is arriving fast.