.
0.18 0.16 0.16 0.14 0.12 0.1 0.08 0.06 0.067 0.0563 0.047 0.04 0.02 0 0.026 0.02 0.004 US US US Saudi Ar Jpn Fin EU 0.04%40.0023% n180030571000 10000n1/10 Partinen M, Hublin C: Epidemiology of Sleep Disorders 52 In Principles $ Practice of Sleep Medicine e-edition 2005 p634 Table 52-5