  We show that if a f.g. group $G$ has a non-elementary WPD action on a
hyperbolic metric space $X$, then the number of $G$-conjugacy classes of
$X$-loxodromic elements of $G$ coming from a ball of radius $R$ in the Cayley
graph of $G$ grows exponentially in $R$. As an application we prove that for
$N\ge 3$ the number of distinct $Out(F_N)$-conjugacy classes of fully
irreducibles $\phi$ from an $R$-ball in the Cayley graph of $Out(F_N)$ with
$\log\lambda(\phi)$ on the order of $R$ grows exponentially in $R$.
