Over the past 10 years of US elections:

In 2012, 42.0% of people who could vote didn't.
In 2014, 64.0% of people who could vote didn't.
In 2016, 40.8% of people who could vote didn't.
In 2018, 50.6% of people who could vote didn't.
In 2020, 33.8% of people who could vote didn't.

— TheValuesVoter (Also on Threads and BlueSky) (@TheValuesVoter) May 9, 2022