What is the oxidation state of Cobalt in CoBr$_2$?

$\begin {array} {1 1} +2 \\ +3 \\ +4 \\+ 5 \end {array}$

There are two bromines $\rightarrow$ the anion (bromine) gives us a charge of -2.
We know that CoBr$_2$ has an overall neutral charge, therefore Cobalt must have an oxidation state of +2 in order to neutralize the -2 charge from the two bromines.
edited Aug 4, 2014