#Distribution
#from to #ORIs freq%
300 319   3     4.4
320 339   4     5.9
340 359   9    13.2
360 379   9    13.2
380 399   9    13.2
400 419  13    19.1
420 439   7    10.3
440 459   8    11.8
460 479   1     1.5
480 499   3     4.4
500 519   2     2.9
#Number of ORIs 68 Mean value=393.1, dispersion=47.8