Stupid SQL Question:

I have a table defined as follows:

CREATE TABLE safety (
    sid SERIAL,
    side INTEGER,
    InjDate DATE,
    InjType INTEGER,
    Outcome INTEGER,
    PRIMARY KEY (sid)
);

What I'm trying to generate is a list of all outcomes and how many of each
that occured for a particular range of dates.

This works but doesn't do dates:

SELECT outcome,count(outcome) from safety
GROUP BY outcome;

How do I incorporte dates into this query.

Adding a WHERE clause to the query doesn't work for example:

SELECT outcome,count(outcome) from safety
GROUP BY outcome
WHERE InjDate='2000-11'14';

Any tips or advice would be apreciated.

Shawn