The Randstad employee confidence index fell 2.1 points in June to a reading of 51.1 after falling 1.1 points in May. These consecutive dips follow a four-year high reading of 55.5 in March. The index measures workers’ confidence in their personal employment situation and optimism in the economic environment.

“These first six months of the year have certainly been different than what analysts and economists expected, with less job creation posted in the second quarter,” said Joanie Ruge, senior vice president and chief employment analyst for Randstad Holding. “While the economy has unquestionably added jobs at a very modest pace, it is certainly interesting to see that workers remain confident about the stability of their current jobs, employers and ability to find employment.”

The index is based on an online survey conducted by Harris Interactive on behalf of Randstad. It surveyed 1,253 employed U.S. adults. The survey took place between June 11 and 13.