That's not a joke either, most people get most of their studying done on the weekend, and it's massively difficult to study with all the football games on. People working weekends also declines during the NFL season in the US.
this is counterintuitive...you would imagine DEC would be higher because of all the people who sat in june then took it again in DEC, which likely increased their odds of passing if they kept studying
my thoughts are maybe its too hard for people to begin studying in July (which gives the average candidate 5 months of prep) and many people start in Aug or Sept which is usually not enough time
i was a statistic..i started my level 1 in august and was a band 10 in dec..the retook in june and got >70 in every single section...