The open season in 2019 for 2020 is Monday November 11, 2019 – Monday December 9, 2019.
https://www.opm.gov/healthcare-insurance/healthcare/plan-information/premiums/, see above at Permalink.
The below are the 2020 rates. They are postal plans and non-postal plans for both HMO (PPO) Plans are listed by states and Fee for Service Plans are nationwide plans in PDF Format.