https://bitcointalk.org/index.php?topic=2007856.msg56492639#msg56492639
As of today these are withdrawal backlog numbers...

BITCOIN CORE
Total pending: 6.36339306 btc

DOGECOIN
Total pending: 3348716.48718156 doge

LITECOIN
Total pending: 285.73590367 ltc

DASH
Total pending: 154.26031936 dash

BITCOIN CASH
Total pending: 20.16640577 bch