Part 2 Topic Usage History, 2011
The topic usage for 2011 is shown on three separate pages:
Page 1, from January 8 to May 1, 2011
Page 2, from May 7 to August 28, 2011
Page 3, from September 3 to December 18, 2011
This same information is in a Microsoft Access file. Note that sometimes this file is not up to date. (Don't worry about any security warnings for opening that file. I get that warning every time I open my file.)
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