Update query for updating just the year part of date

I would be grateful if I could please have an SQL statement for an update query that tells Access to look at a date in one field and update only the year part of the date into another field. So for example if i have a field that has "Date of receipt" and a record in that field says 01/05/2010, I would like the corresponding record in the "Year of receipt" field to be updated to just 2010.

Many thanks,

Edgar