Volunteer Signups - How do you track a families TOTAL volunteer hours across events?

We have a google form that collects our family's name, school event, and their hours because we track volunteer hours for service awards. However, it would be ideal to track with reporting benefits in Constant Contact. How do you do this? 

Please note: we do not want to add a done of events into C.C.

we DO want to connect hours with their contact email address for a more robust understanding of their commitment