Event Monitoring not sending multiple notifications

I set up an event monitor to send me an email when we have over 5,000 pending messages in the router. Now, it does trigger for the first “offense”, but why wouldn’t it send multiple emails? I would think that I would receive an email each time it checks the mail router and it sees that the number increased:

Or does it only send it once until the threshold goes under 5000 and then back up to over 5000? If that is the case, then I am assuming that I would need to set up several monitors to take care of the increase: ie: >5000, >6000, >7000, etc?