I just remembered I found a way to map the citation of bible chapters in the watchtower library (representing 30 years of wt literature). The results are quite interesting.
Higher number means more citations of that chapter in the wt literature of the last 30 years. As you can see there are a few favorites
Regards,
Deus Mauzzim
P.S you can find the excel sheet with the table here: http://www.wikiupload.com/download_page.php?id=180628
EDIT: This link works better: http://files-upload.com/381479/Chapters.xls.html
You just have to wait 30 seconds before you can download.