I don't check the queue calculator that often but here's the dates/queue lengths since we lodged:
02/09/13 - 21,980
22/04/16 - 16,010
22/11/16 - 14,670
09/03/18 - 12,610
22/11/18 - 10,600
In an ideal world 10,600 in the queue at a rate of 1,500 per year makes it just over 7 years left. However seeing what has been happening; I think it could be another 10 years...
The ever shifting ending is making me lean more towards getting a subclass 600 visa to tide them over.