Monitoring LB resopenses count for each HTTP code

I have to make check of count of particular HTTP codes responses. Is it possibe?

i believe there are a couple of ways. this is an example of istats.

Introduction to iStats Part 1: Overview by Colin Walker

 config

root@(ve11a)(cfg-sync In Sync)(Active)(/Common)(tmos) list ltm virtual bar
ltm virtual bar {
    destination 172.28.24.10:80
    ip-protocol tcp
    mask 255.255.255.255
    pool foo
    profiles {
        http { }
        tcp { }
    }
    rules {
        qux
    }
    source 0.0.0.0/0
    source-address-translation {
        type automap
    }
    vs-index 41
}
root@(ve11a)(cfg-sync In Sync)(Active)(/Common)(tmos) list ltm rule qux
ltm rule qux {
    when HTTP_RESPONSE {
  ISTATS::incr "ltm.virtual /Common/bar c HTTP_[HTTP::status]" 1
}
}

 stats (User-defined section)

root@(ve11a)(cfg-sync In Sync)(Active)(/Common)(tmos) show ltm virtual bar

------------------------------------------------------------------
Ltm::Virtual Server: bar
------------------------------------------------------------------
Status
  Availability     : unknown
  State            : enabled
  Reason           : The children pool member(s) either don't have service checking enabled, or service check results are not available yet
  CMP              : enabled
  CMP Mode         : all-cpus
  Destination      : 172.28.24.10:80

Traffic                             ClientSide  Ephemeral  General
  Bits In                               575.2K          0        -
  Bits Out                                1.1M          0        -
  Packets In                            1000.0          0        -
  Packets Out                           1000.0          0        -
  Current Connections                        0          0        -
  Maximum Connections                      100          0        -
  Total Connections                        200          0        -
  Min Conn Duration/msec                     -          -     4.0K
  Max Conn Duration/msec                     -          -     4.6K
  Mean Conn Duration/msec                    -          -     4.0K
  Total Requests                             -          -      200

SYN Cookies
  Status                         not-activated
  Hardware SYN Cookie Instances              0
  Software SYN Cookie Instances              0
  Current SYN Cache                          0
  SYN Cache Overflow                         0
  Total Software                             0
  Total Software Accepted                    0
  Total Software Rejected                    0
  Total Hardware                             0
  Total Hardware Accepted                    0

CPU Usage Ratio (%)
  Last 5 Seconds                             0
  Last 1 Minute                              0
  Last 5 Minutes                             0

User-defined  Value
  HTTP_200  100
  HTTP_302  100