In 2004, what ethnic or racial group that has lower risk of suicide for people ages 65 or older ?

Here are the number of suicide rate for the age 65 of older per ethnic group :

Non-Hispanic Whites — 15.8 per 100,000
 Asian and Pacific Islanders — 10.6 per 100,000
Hispanics — 7.9 per 100,000
 Non-Hispanic Blacks — 5.0 per 100,000 

So the one that has the lower risk of suicide would be : Non-Hispanic Blacks

hope this helps