POLITICO’s Macenzie Weinger breaks down the “revolving door” that never stops spinning.

Nearly 5,400 former staffers have jumped from Congress to K Street in the past decade, according to a new study.

The congressional aides, along with almost 400 former lawmakers, became lobbyists after leaving Capitol Hill in the last 10 years, the Washington Post reported on Tuesday based on online disclosure website LegiStorm’s study. This year, 2,900 former staffers are currently registered as lobbyists.

Read about who’s made the jump.

Related: How to get ahead on the Hill.