Younger generations narrowly outvoted baby boomers and older generations last November for the first time ever in a modern midterm election, according to an analysis released Wednesday by the Pew Research Center.

The Census Bureau data, first released last month, showed that the 2018 midterm elections saw the highest voter turnout in a midterm election in four decades.

Of the over 120 million votes cast in the midterm election, 62.2 million came from voters younger than 54, a group made up of the three younger generations of voters. Generation Z — voters ages 18 to 21 who cast votes in the first midterm election they were eligible to vote— provided 4.5 million of these votes and pushed younger voters just over the older generations’ 60.1 million vote count.

While all age groups saw a record high turnout among eligible voters, turnout among millennials — voters ages 22 to 37 in 2018 — nearly doubled, growing from 23% to 42%.

This isn’t the first time that the three younger generations have outvoted those older than them. In fact, Pew found that the same trend occurred in the 2016 presidential election — but midterm elections have been historically overlooked by younger voters. The 2014 midterm, which saw the highest number of votes from voters in Generation X and later generations of any midterm prior to 2018, fielded nearly 22 million fewer votes from the younger generations.

But in 2018, concentrated efforts sought to engage young voters on issues that resonated with them. With the February shooting at Marjory Stoneman Douglas High School in Parkland, Florida, and the March For Our Lives demonstration just one month later, young people led a movement against gun violence well ahead of the midterm election. The Sunrise Movement, FridaysForFuture, US Youth Climate Strike and other groups have mobilized young people around the issue of climate change as they increasingly realize their generations will most significantly face its effects.

“All of these movements understand that if we want to win the future we’re trying to visualize — a just future where we have a livable planet, where children aren’t gunned down in schools — then we need to activate the youth vote,” said Aracely Jimenez-Hudis, a spokeswoman for the Sunrise Movement.

The data provides further evidence to those looking to dispel the long-held notion that younger generations in the U.S. don’t turn out to vote, especially in the midterms.