From the complete set of death records occurring between 1990 and 2004, we selected records for which either suicide or homicide was listed as the underlying cause, or among the contributing causes of death using ICD-9 and ICD-10 codes (World Health Organization, 1980; World Health Organization, 1992). For 1999–2004 records, ICD-10 codes for suicide include X60-X84 and Y87, corresponding to intentional self-harm and sequelae of intentional self-harm; ICD-10 codes for homicide included X85-Y09 and Y89 (assault and sequelae of assault). For 1990–1998, suicide records corresponded to ICD-9 codes of E950–E959, and homicide codes included E960–E969. ICD-9 to ICD-10 comparability ratios for both of these outcomes are very close to 1.0 (Anderson et al., 2001).
