(MARKETWATCH) — The numbers: Americans quit their jobs in May at the fastest rate since 2001, showing that workers feel so good about the economy they are willing to leave one company for another.

The percentage of people in the private sector who left their jobs by choice rose to 2.7% from 2.5%, the government said Tuesday. The so-called quits rate among all workers edged up to 2.4% from 2.3%. Both hit the highest levels since 2001.

Most workers who leave jobs voluntarily end up getting better pay or benefits elsewhere. More people are willing to make the switch when the economy is booming.

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