While there are economic fluctuations from decade to decade that caused some peaks and valleys, it's possible that this relatively constant tenure number doesn't yet capture the changing attitudes of young professionals. And one BLS survey found that the youngest Boomers -- those born between 1957 and 1964 -- held an average of 10.2 jobs between the ages of 18 and 38, a number that will probably just keep going up. Regardless, the fact is that recruiters definitely think we're more fickle -- and they're starting to forgive us for it.