Well, 4 particularly good years for deadpooling I can recall were 2009, 2012, 2015 and 2017. The Deathlist did pretty good in all, but started very slowly, with 3rd hits not happening till May, even.
Just copying and pasting my response from 2015 and 2017 even 2017's 3rd hit was actually in March.
Look, we all know the score. Death isn't regular, its random, especially with the oldies. The DL can have a random death per month (as last year mostly went) or snooze for ages then suddenly have 6 successes in 5 weeks. They all equal out in the end. Patience, eh? Mugabe, Mubarak and Bryan Adams will die one day, but then, so will Bernard Cribbins, Tom Baker and Ozzy Osbourne.