You will probably save the form results in you domain model.
Use a microflow to open the page with the form.
In this microflow, retrieve the forms within the given year and do a Count on the amount of forms you have retrieved.
The last part is to create a View object – a non persitable object – in which you can write down the count.
This View object can be created in the microflow as well and be given to the page.
On the page, use a data view widget to show the View object and now you can show the Count with a text widget.
Hope this helps