How do I attract ducks to my pond?

I live in the PNW and have a small pond, about 40-50 feet across. It’s shaded, protected by trees, has tall aquatic grasses on one side, and plants ducks usually like. But alas….no ducks! I have lived in this house for 5 years now and never seen any visit. What can I do to attract more ducks to my pond?

Some context:

The area where I live is very biodiverse, and has a large population of ducks (various species).

I live very close to the ocean shore

My property is mostly forest