Here's December 2014's monthly analysis of the pushes to our Mozilla development trees. You can load the data as an HTML page or as a json file.

Trends
There was a low number of pushes this month.  I expect this is due to the Mozilla all-hands in Portland in early December where we were encouraged to meet up with other teams instead of coding :-) and the holidays at the end of the month for many countries.
As as side node, in 2014 we had a total number of 124423 pushes, compared to 79233 in 2013 which represents a growth rate of 57% this year.

Highlights
7836 pushes
253 pushes/day (average)
Highest number of pushes/day: 706 pushes on Dec 17, 2014
15.25 pushes/hour (average)

General Remarks
Try had around around 46% of all the pushes
The three integration repositories (fx-team, mozilla-inbound and b2g-inbound) account around 23% of all of the pushes

Records
August 2014 was the month with most pushes (13,090  pushes)
August 2014 has the highest pushes/day average with 422 pushes/day
July 2014 has the highest average of "pushes-per-hour" with 23.51 pushes/hour
October 8, 2014 had the highest number of pushes in one day with 715 pushes 

http://relengofthenerds.blogspot.com/2015/01/mozilla-pushes-december-2014.html