11% Reduction In Backlog Of Pending Cases?

     From National Public Radio:

... Social Security field offices are closed. But the shutdown hasn't stopped the agency from processing claims for new benefits and appeals of benefit denials. And according to statistics that the SSA sent its workers, the agency has been doing so at a faster pace than before. ...

According to [Ralph] deJuliis [head of the union that represents most Social Security employees], the SSA has found that its backlog of pending cases has fallen by 11% since March 23, when the agency instituted wide-scale telework, and that calls from recipients are answered more quickly. ...

     Exactly which backlog of pending cases is it that's fallen by 11% since March 23? There are many backlogs at Social Security and they certainly haven't all dropped by 11% in less than a month and a half. I'd love to see those statistics that Social Security sent its employees.