11 instances from 3 years 2019 - 1 instance Jan Feb Mar Apr May Jun Jul 20 Aug Sep Oct Nov Dec 2017 - 2 instances Jan 8 Feb Mar Apr May Jun 23 Jul Aug Sep Oct Nov Dec 2016 - 8 instances Jan Feb Mar Apr May Jun 22 24 Jul Aug Sep 20 Oct 1 4 3 Oct 4, 2016 3 instances 16:06:52 16:41:33 19:21:31 Nov Dec 30