I received an email this morning from LinkedIn that summarized a year's worth of job changes among my contacts with a large graphic full of smiling faces.

In all, 40% of my LinkedIn contacts changed jobs in 2010. Am I naive to think that's really high? Yes, I'm part of the trend (having changed jobs in June), but I didn't know that so many others had done the same.

Have you received this email yet? What percentage of your contacts jumped ship?