1 Rare
Only occurs when extreme circumstances (1 time per 5 years)
2 Unlikely
Has not happened, but can occur at any time (1 time per 3 years)
3 Possible
Should have happened and might happen (1 time per 1 year)
4 Likely
Can happen easily and may appear on the state of the most ( more than 5 times per 3 years)
5 Almost
likely Frequent and most common (more than 5 time per 1 year)
Aggregate Risk Potential