Matching a year

[zzz]

I have a db field type date: 0000-00-00

I also have a var $CurrentYear in the following format: 2006

Currently I have the following snippet in my current query:

YEAR( t1_i.i_date ) as yr

I need to add a condition into a query to match all entries that match 2006, how do I do that?

WHERE yr = ".$CurrentYear."

Sort of lost.