Do you have a source for this? I looked up your claim and found this study from the NHTSA[0] (pg 23), which does say that 60% of pedestrians hit have a BAC over 0.08; the catch is, that number is specifically for crashes which occur between 12:00AM and 3:00AM.
From pg 26 - "Of the pedestrians involved [in fatal crashes across all hours], 33 percent were intoxicated, with a blood alcohol concentration (BAC) of 0.08 grams per deciliter (g/dl) or greater."
Since the NHSTA study I linked was conducted in 2001, it's possible that new information has been made available in recent years; if that is the case and that's where your data comes from, feel free to link.
[0] https://crashstats.nhtsa.dot.gov/Api/Public/Publication/8094... - pg 23