Where is that claim documented?
Not an accurate statement. 6.2% is more accurate.
https://blog.dogsbite.org/2021/06/2020-dog-bite-fatality-statistics-discussion.html
2020 U.S. Dog Bite Fatality Statistics - DogsBite.org
Fatal Dog Attack Statistics
DogsBite.org recorded 46 fatal dog attacks in 2020. Pit bulls contributed to 72% (33) of these deaths, over 16 times higher than any other dog breed. During this pandemic year, media reports of fatal dog maulings fell by 45%. In response, our nonprofit sent out 30 FOIAs to various offices and uncovered 6 unreported deaths in 2020. The last time the CDC collected breed data about dogs involved in fatal human attacks was 1998. Pit bulls have killed over 440 Americans since.
46 U.S. dog bite-related fatalities occurred in 2020. Despite being regulated in Military Housing areas and over 900 U.S. cities, pit bulls contributed to 72% (33) of these deaths. Pit bulls make up about 6.2% of the total U.S. dog population.
During the 16-year period of 2005 to 2020, canines killed 568 Americans. Two dog breeds, pit bulls (380) and rottweilers (51), contributed to 76% (431) of these deaths. 37 different dog breeds were involved in the remaining fatal dog maulings.
In 2020, the combination of pit bulls (33), additional bull breeds (4) and mastiff-type guard dogs and war dogs (3) — the types used to create “baiting” bull breeds and fighting breeds — accounted for 87% (40) of all dog bite-related deaths.
See full report: 2020 U.S. Dog Bite Fatality Statistics - DogsBite.org
News release: Nonprofit Releases 2020 Dog Bite Fatality Statistics - Attacks by Bull Breeds Increase and Trends from the 16 Year Data Set
This year’s release includes statistics from our 16 year data set. From Jan. 1, 2005 to Dec. 31, 2020, canines killed 568 Americans. Pit bulls contributed to 67% (380) of these deaths. Combined, pit bulls and rottweilers (51) contributed to 76% (431) of attacks resulting in death. When mastiff-type guard dogs and war dogs are added — the types used to create “baiting” bull breeds and fighting breeds — this small group of dog breeds accounts for 84% (477) of all dog bite-related deaths. In discussion notes, we examine 2020 trends. Over the summer and fall months we will update the combined year study to include the 16 year data set.