Here's a little early list:
- svn 806    sdk 1.0.0   1.0  2005-08-25
 - svn 
??    sdk 1.10.0 - svn 4924   sdk 1.11.12    8.02  2008-03-01
 - svn 6335   sdk 1.11.12    10.05  2010-06-08
 - svn 7789   sdk 1.11.18
 - svn 
??    sdk 1.12.0 - svn 8500   sdk 1.13.11
 - svn 8549   sdk 1.13.14
 - svn 8629   sdk 1.13.14    12.11  2012-11-28
 - svn 
??    sdk 1.14.0 - svn 8818   sdk 1.15.0
 - svn 
??    sdk 1.16.0 - svn 9156   sdk 1.17.0
 - svn 9232   sdk 1.18.0
 - svn 9501   sdk 1.19.0      13.12  2013-12-27
 - svn 9639   sdk 1.20.0
 - svn 
??    sdk 1.21.0 - svn 
??    sdk 1.22.0 - svn 9778   sdk 1.23.0
 - svn 10091  sdk 1.24.0
 
If you have additional information I will add ...
I think the above information is not correct. I just try to use git to find the SDK changes
git log -p -- src/include/cbplugin.h -S"PLUGIN_SDK_VERSION_MINOR" >> result.txt
Then, I just search the result.txt with "+#define PLUGIN_SDK_VERSION_MINOR", I get the result:
PLUGIN_SDK_VERSION_MINOR -> revision
24, 10050
23, 9767
22, 9763
21, 9759
20, 9606
19, 9283
18, 9204
....
EDIT:Some post says "-S" option should be replaced by "-G", see: 
git -S VS -G, but in my testing environment (msysgit 1.9.5), I don't see there differences.
EDIT2:I just check the result.txt, I see that my command
git log -p -- src/include/cbplugin.h -S"PLUGIN_SDK_VERSION_MINOR" >> result.txt
don't do any search of the keyword of commits, it just blindly print all the diffs of each commits in the history of cbplugin.h.  
