Definition 4 is the definition that gives the best meaning for picture as it is used in the sentence.
Definition 4 states that the meaning of picture is a mental image; an image or reality portrayed in an account or reality; a depiction
The use of picture in the sentence is actually revealing that the "information on employment" actually depicts or shows the state of the workforce and the economy of the state. It gives a mental image of how the workforce and state's economy looks like.
