Table

Availability for automatic identification system for ships (AIS), statistical measures for all base stations¹
	April 2013	August 2013	December 2013
¹Mode is supressed. In the few cases this statistic comes out with a value it's informational value is still close to nil.
Availability (current month)
Median	99.71	100.00	100.00
Average	98.91	98.98	99.72
Standard deviation	3.37	3.75	1.49
Mode	100.00	100.00	100.00
Minimum value	78.23	75.93	90.21
Maximum value	100.00	100.00	100.00
Availability last 24 months
Median	99.73	99.68	99.69
Average	99.51	99.55	99.54
Standard deviation	0.87	0.44	0.47
Mode	..	..	..
Minimum value	94.48	97.85	98.06
Maximum value	99.92	99.92	99.93