Table 4: The percentage of observations in each interval of log10 (QNW).

Interval [−∞, 1] [1, 2] [2, 3] [3, 4] [4, 5] [5, 6] [6, 7]
Percentage 69.56% 14.20% 10.34% 4.42% 1.39% 0.084% 0.014%