What’s your COVID-19 RPM drop?

Just chekced four banners, and their drop percentages are:

320  x  50 | -66.81% 970  x  90 | -84.01% 720  x  90 | -65.52% Responsive | -58.57% 

Date period: Oct 2019 - Apr 2020 vs Apr 2020 - Now

What are your numbers?