Millennials have now surpassed Generation X to become the largest generation in the American workforce, according to a Pew Research Center analysis of U.S. Census Bureau data.

Adults between the ages of 18-34 now make up one in three American workers, Pew reports. They outnumbered working adults in Generation X, who were 18-33 in the year 1998, in early 2015 after overtaking Baby Boomers last year.

The estimated 53.5 million millennials in the work force are only expected to grow as millennials currently enrolled in college graduate and begin working. The generation is also growing thanks to recent immigration, as more than half of new immigrant workers have been millennials.

The millennial generation as a whole, not just those in the labor force, is also expected to surpass the Baby Boom generation as the largest living generation in the U.S.

Get The Brief. Sign up to receive the top stories you need to know right now. Please enter a valid email address. Sign Up Now Check the box if you do not wish to receive promotional offers via email from TIME. You can unsubscribe at any time. By signing up you are agreeing to our Terms of Use and Privacy Policy . This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply. Thank you! For your security, we've sent a confirmation email to the address you entered. Click the link to confirm your subscription and begin receiving our newsletters. If you don't get the confirmation within 10 minutes, please check your spam folder.

Write to Nolan Feeney at nolan.feeney@time.com.