With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cnatAddrPortBindInTranslate
cnat Address Port Bind In Translate
1.3.6.1.4.1.9.10.77.1.2.4.1.12
The number of inbound packets that were translated as per this BIND entry.
Back to CISCO-IETF-NAT-MIB MIB page.
IPHost Network monitor allows you to monitor cnatAddrPortBindInTranslate on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco routers right now.