ONLY 6 ½ OUT OF 10 PASSED THE ARIZONA BAR EXAM ON THE FIRST TRY IN 2017

I was surprised, and mildly interested, to learn that Arizona is one of the five states with the lowest first time pass rates for its bar exam.  The rate is under 65%, lower even than California, which I would have guessed would be the lowest just because it has a reputation for having a low pass rate, and a high number of applicants.  
The five states with the highest first time pass rates have rates of almost 84% up to almost 87%.
I think the 65% pass rate for Arizona (that’s for 2017) is lower than it was when I took the bar exam over thirty years ago.  I wonder why it’s lower now, and why it’s so low overall?