Cycles until failure (millions)  0-20   20-40   40-60   60-80   80-100   100-140
Number of units (frequency)	 1	2	8	4	3	 5

PCB mass in sample               0.0-0.25   0.25-0.5   0.5-1.0   1.0-2.0   2.0-5.0   5.0-10.0
Number of samples (frequency)	 22 	    14 	       18 	 11 	   5 	     4

Peak flow (Mm3s−1)		 10-12   12-14   14-16   16-18   18-20    20-22    22-26
Number of years (frequency)	 3 	 7 	 20 	 19 	 16 	  8 	   6

Percentage increase in operating current   6-7   7-8   8-10   10-13 
Number of lasers (frequency)	 	   5 	 5     2      3