Planning Areas of Singapore increasingly adopted these boundaries for their administrative purposes. For example, the Statistics Department of Singapore published its 2000 census data based on planning area boundaries for the first time, compared to using census divisions based on electoral boundaries for previous exercises. The Singapore Police Force's (SPF) neighbourhood police centres have jurisdiction boundaries based on planning area boundaries when they were officially gazetted in 1999, as opposed to electoral divisions under the previous neighbourhood Police Post system. Planning Areas are further subdivided into subzones for statistical purposes. <nowiki>*</nowiki> = Place names attested to be of Malay origin and referred to similarly
Subdivided flat for public estates, they turn to live in subdivided flats, where rental prices are much cheaper than that of private housing options available. The second factor leading to the phenomenon comes from the widening wealth gap between the rich and poor. The Gini Coefficient of Hong Kong increased to 0.537, which manifests the serious economic inequality problem. In the subdivided units study report 2009 produced by the Society of Communication Organization, the median monthly personal income of the residents in subdivided units was $3200, which was below the median monthly personal income of the whole population in Hong Kong at