In a direct communication, the Turkish Statistical Institute explained:

We would like to inform you that the industry "Administrative and support service activities" has decreased this year because the transfer of the subcontractor workers to the public staff is reflected in the employment data from the beginning of 2018. So, there have been fluctuations between the sectors due to the fact that the subcontractors employed in "Administrative and support service activities" have started to work in sectors of "Public administration and defense" and "Human health and social work activities".

The series reside in the historical catalog (Turkey » Labor and Wages » Employment by industry » NACE Rev. 2 » Monthly, from 2014) and are:

• LWQEMASTUM.ITUR = Administrative and Support Service Activities, (Ths. #, NSA)
• LWQEM84TUM.ITUR = Public Administration and Defense
• LWQEMHSTUM.ITUR = Human Health and Social Work Activities

The first series exhibits a decline between January and May 2018, and the latter two series show a corresponding increase.

Because catalog locations are subject to change, the upper-right search box on DataBuffet.com provides a "find in catalog" mode that accepts a mnemonic.