The results of the shared task are summarized in the paper:

Findings of the 2020 Conference on Machine Translation
Findings of the WMT 2020 Biomedical Translation Shared Task: Basque, Italian and Russian as New Additional Languages

The raw data is available here:

You can also download the past raw data from WMT07, WMT08, WMT09, WMT10, WMT11, WMT12, WMT13, WMT14, WMT15, WMT16, WMT17, WMT18 and WMT19 .