Group posts per year in the list

Hi Martin,

I am testing now the free plugin and made some lists.
I looked for the option to group the posts in a list per year. I mean, to collapse the list in groups per year. When you click on a year, the posts of that particular year will be displayed.
Is this possible, and how to make it that way.
Thank you for your very appreciated reply.

Best regards,
Staf Campforts

The page I need help with: [log in to see the link]