Excel 2007 : Identify Same Day Trip Starts

What I've created is a spreadsheet that represents different schedules for pilots. The number "2" represents the start of a new trip, and the number "1" represents subsiquent day(s) of flying.
A 1 day trip would look like this:
2

A multiple day trip would look like this:
2
1
1
(etc)

I'm trying to figure out how many lines have trips that start on the same day consistantly.



I know only lines 4,7,13,14,21,22,&25 all meet the criteria, but I can't figure out how to get excel to read it and give me a total.

Any help is greatly appreciated.