One important thing to note with this inforgraphic is that the data shown above is changing every couple of days, and will not be fully updated until right before Thanksgiving. While most of us tend to think that once election day is over, all ballot counting verification is also over, that is actually pretty far from the truth.
Ballots are verified, and ballots from overseas are not even counted until about eight days after the election.
Another important piece of information for this comparison is that in 2013, Colorado changed the way in which voting happens. More ballots were sent out through the mail, voting centers wee open weeks before election day arrived, and fewer actual voting locations existed because of the extended amount of time voters had to turn in mail-in ballots.
Factor that in with the huge population growth in Colorado that has happened between these two elections, and the numbers are going to be fairly different. Still, it is interesting to see how things have shifted in Boulder from 2012 until now.