The largest voter turn out in the history of the US before Trump was about 7% greater then average presidential election. Obama was so well liked they talked about it for years the amazing accomplish to pull in such a large percentage of voters. 2020 election there was about 50% greater then average.
(Wikipedia "claims" 239 million eligible voters (still an anomaly of 65% (their math is off.)) real figure was 213 million voters (source worldpopulationreview registered voters by state) would be about 75% turn out in 2020. The record turn out in US history was 45% when Obama ran in 2008. Or an approximate mean of about 37 to 39% since the 1930's (going by wikipedia chart on voter turn out) With cheating this doubles the average presidential turnout and about 40% greater then our all time record of 2008
This was the source of Wiki now wiki and the source has changed the old figures. https://archive.vn/223kd
https://worldpopulationreview.com/state-rankings/number-of-registered-voters-by-state
Notes difference in voter registered voters
Why did voter registration go down sense Nov 2020?
Massive changes to percentage of registered voters
Archived page as of 4 Nov 2020
Alaska (82.46%) 11/3/2020
Michigan (81.33%) 11/3/2020
Kentucky (79.57%)
Vermont (79.47%)
Maine (78.51%)
Rhode Island (76.29%)
North Dakota (75.50%)
Alabama (75.17%)
Delaware (74.58%)
New Jersey (73.09%)
Current page as of 4/7/2021
Maine (77.10%) (date not given source this archive
https://archive.vn/3H0I7 Mississippi (72.90%)
Michigan (71.20%)
Kentucky (70.90%)
North Dakota (70.90%)
Minnesota (70.80%)
Missouri (70.60%)
Wisconsin (70.50%)
Montana (70.40%)
Iowa (69.80%)
Archived page as of 4 Nov 2020
https://archive.vn/LkjN8 Current page
https://worldpopulationreview.com/state-rankings/number-of-registered-voters-by-state