= num messages
242.000	78.06%	weather/surface-based-observations
		242.000	78.06%	/synop
 68.000	21.94%	weather/experimental
310.000	100.0%	(total)
= size
  6.81M	97.29%	weather/experimental
190.05k	 2.71%	weather/surface-based-observations
		190.05k	 2.71%	/synop
  7.00M	100.0%	(total)
= n topics for centreid
ca-eccc-msc-global-discovery-catalogue	1
io-wis2dev-11-test	1
io-wis2dev-12-test	1
io-wis2dev-13-test	1
io-wis2dev-14-test	1
io-wis2dev-15-test	1
my-metmalaysia	1
mz-inam	1
= n topics for category
weather/experimental	5
weather/surface-based-observations/synop	2