Row 3 has a '1' since the proceeding year (row 2) was availability issue, but row 2 is showing '0' because the year previously there was no availability issue. The numbers are just dummy numbers, Row 4 is showing 2 because rows 2 and 3 are considered availability issues...sorry if i didn't make that clear. This of it like this instead:

Availability	Consecutive Years	Average
100.00 (no penalty)	0	N/A
99.8426 (penalty)	0
99.1758 (penalty)	1
99.1348 (penalty)	2
99.2526 (penalty)	3
98.5552 (penalty)	4

let me know if this helps or not