Equal-count BU bins
Q1: 0.00-0.60% (53)
Q2: 0.61-1.61% (53)
Q3: 1.62-2.61% (53)
Q4: 2.72-4.09% (52)
Q5: 4.11-6.26% (52)
Q6: 6.30-8.44% (52)
Q7: 8.57-12.49% (52)
Q8: 12.52-18.61% (52)
Q9: 18.63-38.57% (52)