VPN tunnels usage - SSG140

Hi,

I´d like to know how to check the VPN usage for the SSG140.

The get license shows 500 VPN Tunnels:

SSG140A(M)-> get license-key
Model: Advanced
Sessions: 48064 sessions
Capacity: unlimited number of users
NSRP: ActiveActive
VPN tunnels: 500 tunnels

Is it correct to interpret the usage as the number of "sa" configured?

SSG140A(M)-> get sa
total configured sa: 156

Thank you!

Bruno Campos