France is mainly divided into 18 administrative regions: 13 regions in metropolitan France (including the territorial collectivity of Corsica), and five located overseas. The regions are further subdivided into 101 departments, which are numbered mainly alphabetically. This number is used in postal codes and was formerly used on vehicle number plates. Among the 101 departments of France, five (French Guiana, Guadeloupe, Martinique, Mayotte, and Réunion) are in overseas regions (ROMs) that are also simultaneously overseas departments (DOMs), enjoy exactly the same status as metropolitan departments and are an integral part of the European Union. The 101 departments are subdivided into 335
Subdivided flat people live in subdivided flats or other similarly undesirable conditions. With reference to the study by the Society for Community Organisation, people living in subdivided flats are mainly unemployed citizens, low income family, new immigrants, etc. The average size of a subdivided flat is found to be 30 square feet per person. The insufficient supply of public housing is one of the important driving forces leading to the appearance of subdivided units. In accordance with the grassroots housing rental price research report 2011 released by the Society for Communication Organization, the government lacks future evaluation of the housing demand in