The value of this attribute determines if statistics tracking is enabled for system-level policies. System-level policies are created to enforce the default QoS processing rules associated with 'trusted' and 'untrusted' interface classes. This attribute is consulted during system policy creation. Setting this object to 'disabled(1)' causes statistics tracking to be disabled for the system-level policy being created. No statistics counter resources will be consumed. Setting this attribute to 'individual(2)' causes individual counters to be allocated for each classifier that comprises the system-level policy. A value of 'aggregate(3)' causes a single statistics counter to be allocated to track data associated with all of the classifiers that comprise the system policy. The value of this attribute is consulted when a policy is created or reinstalled. This allows the filter statistics tracking to be enabled only when deemed necessary.