Here's some compiled data on auctions with no result:
Field: No Result % of TTL Is compiled via -> Auct No Result / (Auct No Result + # Auct)
As can be seen the weekend just been (revised down to 94) has the highest percentage of unreported results apart from the public holiday and election weekend.
Field: REVISED CLEARANCE Is compiled via -> Auct Sold / (Auct No Result + # Auct)
This gives a clearance rate that adds any unreported to the unsold category to give what is likely a more accurate reflection of the true clearance rate.