National Grandparents Day — which falls on Sept. 10 this year — has been around since 1970 when Marian McQuade started a campaign to create a day honoring grandparents, according to the U.S. Census Bureau. The holiday became official in 1978, when President Jimmy Carter signed a federal proclamation declaring the first Sunday after Labor Day as National Grandparents Day.

In honor of that day celebrating our nation’s grandparents, here's a look at some statistics about their role in American society: