Currently we have macros that return number of unacknowledged events:

{TRIGGER.EVENTS.UNACK} {TRIGGER.EVENTS.PROBLEM.UNACK} {TRIGGER.PROBLEM.EVENTS.PROBLEM.UNACK} {TRIGGERS.UNACK} {TRIGGERS.PROBLEM.UNACK}

We should extend it so that number of acknowledged events can be returned as well:

{TRIGGER.EVENTS.ACK} {TRIGGER.EVENTS.PROBLEM.ACK} {TRIGGER.PROBLEM.EVENTS.PROBLEM.ACK} {TRIGGERS.ACK} {TRIGGERS.PROBLEM.ACK}