#Distribution
#from to #ORIs freq%
220 239   4     5.7
260 279   1     1.4
300 319   2     2.9
320 339   1     1.4
340 359   7    10.0
360 379   7    10.0
380 399   4     5.7
400 419   4     5.7
420 439   6     8.6
440 459   7    10.0
460 479   9    12.9
480 499   7    10.0
500 519   6     8.6
520 539   3     4.3
540 559   1     1.4
560 579   1     1.4
#Number of ORIs 70 Mean value=418.3, dispersion=78.6