How can I count and sum entries per date?

Hello,

I have a worked listing items per date, ie

11-1-2011 hot
11-1-2011 cold
11-1-2011 hot
11-1-2011 warm
11-2-2011 hot
11-3-2011 something
11-3-2011 cold
11-3-2011 red

How can I count the number of entries for each date, so a result like:

11-1-2011 4
11-2-2011 1
11-3-2011 3

Thank you!