Present Perfect: "For" or "Since"?

Maya has been a professional singer ________ 1989.

They've been married ________ twenty-five years.

Cougars have almost disappeared from the Victoria area ________ humans settled here.

I haven't been snowboarding ________ last winter.

Mary has kept a diary ________ she was ten years old.

The Canadian two-dollar coin (or toonie) has been in circulation ________ 1996.

First Nations people in British Columbia have told stories about the eagle ________ hundreds of years.

Jo has been a student here ________ March.

The beaver has been an emblem of Canada ________ many years.

So far, it has rained ________ five hours.