Nannies - insured persons due to taking care of children on the basis of activating agreement within the meaning of the Act of February 4, 2011 on the care of children up to the age of 3. Data from the Central Register of Insured Social Insurance Institution. Data for Poland "total" may differ from the sum from voivodships, due to the lack of information on insured persons, which makes it impossible to assign data to individual voivodships.