Creating blank rows between different values in a column

[MadCrammer]

I am trying to create a simple macro that looks at a specific column, starts at row 1 and inserts a blank row whenever a new value appears below it.

For example, if column B looked like this:

SERPO <--Row 1
SERPO
SERPO
TACOMA
TACOMA
TACOMA
CINCINNATI
CINCINNATI
HOPKINS
HOPKINS
HOPKINS

The macro would insert a row between serpo and tacoma, tacoma and cincinnati, etc. like this:

SERPO
SERPO
SERPO

TACOMA
TACOMA
TACOMA

CINCINNATI
CINCINNATI

HOPKINS
HOPKINS
HOPKINS

I'm really only familiar with using the macro recorder, so I didn't know of a way to do this. I have to do this daily and there are usually 30+ different values and 4000+ lines so I'm trying to create a time saver.