I'm pretty sure the statistics profile metrics are stored in memory only. You can access them from the GUI, iControl of via SNMP but not in a physical file.
The GUI displays the Statistics Profile counts under Overview >> Statistics : Profiles - Statistics. For SNMP:
snmpwalk -v2c -c public localhost F5 | grep -i test_stats
F5-BIGIP-LOCAL-MIB::ltmUserStatProfileName."test_stats" = STRING: test_stats
F5-BIGIP-LOCAL-MIB::ltmUserStatProfileConfigSource."test_stats" = INTEGER: usercfg(0)
F5-BIGIP-LOCAL-MIB::ltmUserStatProfileDefaultName."test_stats" = STRING: stats
F5-BIGIP-LOCAL-MIB::ltmUserStatProfileStatName."test_stats".1 = STRING: test_stats
F5-BIGIP-LOCAL-MIB::ltmUserStatProfileStatName."test_stats".2 = STRING: test_stats
F5-BIGIP-LOCAL-MIB::ltmUserStatProfileStatName."test_stats".3 = STRING: test_stats
F5-BIGIP-LOCAL-MIB::ltmUserStatProfileStatFieldId."test_stats".1 = INTEGER: 1
F5-BIGIP-LOCAL-MIB::ltmUserStatProfileStatFieldId."test_stats".2 = INTEGER: 2
F5-BIGIP-LOCAL-MIB::ltmUserStatProfileStatFieldId."test_stats".3 = INTEGER: 3
F5-BIGIP-LOCAL-MIB::ltmUserStatProfileStatFieldName."test_stats".1 = STRING: allowed_clients
F5-BIGIP-LOCAL-MIB::ltmUserStatProfileStatFieldName."test_stats".2 = STRING: session_table_size
F5-BIGIP-LOCAL-MIB::ltmUserStatProfileStatFieldName."test_stats".3 = STRING: redirections
F5-BIGIP-LOCAL-MIB::ltmUserStatProfileStatFieldValue."test_stats".1 = Counter64: 420906795008
F5-BIGIP-LOCAL-MIB::ltmUserStatProfileStatFieldValue."test_stats".2 = Counter64: 0
F5-BIGIP-LOCAL-MIB::ltmUserStatProfileStatFieldValue."test_stats".3 = Counter64: 0
F5-BIGIP-LOCAL-MIB::ltmVirtualServProfileVsName."thomas_session_limit"."test_stats" = STRING: thomas_session_limit
F5-BIGIP-LOCAL-MIB::ltmVirtualServProfileProfileName."thomas_session_limit"."test_stats" = STRING: test_stats
F5-BIGIP-LOCAL-MIB::ltmVirtualServProfileType."thomas_session_limit"."test_stats" = INTEGER: user(15)
F5-BIGIP-LOCAL-MIB::ltmVirtualServProfileContext."thomas_session_limit"."test_stats" = INTEGER: all(0)
For details on using iControl to check the stats, try posting in the iControl section as I haven't tried this before.
Aaron