Note: small arms are guns that can usually be carried.
US: 90
Yemen: 61
Finland: 56
Switzerland: 46
Iraq: 39
Serbia: 38
France: 32
Canada: 31
Austria: 31
Germany: 30
From The Small Arms Survey 2007: Guns and the City press release there is the following interesting observation:
"Brazil’s firearm homicide rate surpasses that of some countries at war, with a firearm death rate that grew threefold from 7 to 21 deaths per 100,000 in the period 1982–2002."