The duration of the visits, which was slightly less than 2014, is still consistent as compared to 2010 to 2013. In 2015, the inspectors spent: - 153 days in detention facilities; - 143 days in hospitals; - 112 days in custody facilities; - 36 days in administrative detention centres; - 32 days in a juvenile detention centre; - 14 days in jails and cells of courts; - 11 days in customs detention centres; - 4 days on deportation procedures. I.e. a total of 505 days in places of deprivation of liberty. 3.2 Nature of the visits (since 2008) Unannounced Scheduled Custody facilities, TGI cells, customs, etc. 525 3 Juvenile detention centres 57 7 Healthcare institutions Penal institutions 90 83 112 124 Detention centres and facilities, waiting areas, etc. 95 6 Total 879 223 In total, 80% of the institutions were visited unannounced and 20% in a scheduled manner. These percentages are to be adjusted according to the type of institution concerned. Visits conducted in an unexpected manner thus comprise the following percentages: - 99.43% with regard to police custody facilities, court cells and customs; - 94.06% with regard to detention centres for illegal immigrants, waiting areas and deportation procedures; - 89.06% with regard to juvenile detention centres; - 52.02% with regard to healthcare institutions; - 47.46% with regard to penal institutions; This distribution between announced and unannounced visits does not vary much from year to year. In principle, it obeys a simple rule: - visits to complex institutions in which persons deprived of liberty can stay for several years are announced unless there are grounds to do otherwise, since this way, the CGLPL can benefit, as soon as it arrives, from a documentary case-file and a meeting with the primary managers of the institution; - on the other hand, visits to small institutions in which persons deprived of liberty stay for only brief periods are, in principle, unannounced. 102