With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cnatAddrMapStatsOutTranslate
cnat Address Map Stats Out Translate
1.3.6.1.4.1.9.10.77.1.3.2.1.4
The number of outbound packets, pertaining to this address map entry, that were translated.
Back to CISCO-IETF-NAT-MIB MIB page.
IPHost Network monitor allows you to monitor cnatAddrMapStatsOutTranslate on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco firewalls right now.