Availability	Downtime Per Year (24x7x52)
99.000%	3 days, 15 hours, 36 Minutes
99.500%	1 day, 19 hours, 48 Minutes
99.900%	8 hours, 46 Minutes
99.950%	4 hours, 23 Minutes
99.990%	53 Minutes
99.999%	5 Minutes
100%	The Holy Grail !!