17 instances from 4 years 2020 - 1 instance Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov 14 Dec 2018 - 2 instances Jan 12 Feb Mar Apr May Jun Jul 12 Aug Sep Oct Nov Dec 2017 - 2 instances Jan 8 Feb Mar Apr May Jun 23 Jul Aug Sep Oct Nov Dec 2016 - 12 instances Jan Feb Mar Apr May Jun 21 22 Jul Aug Sep 20 4 Sep 20, 2016 4 instances 16:02:35 16:51:37 21:33:28 21:50:58 Oct 1 2 Oct 1, 2016 2 instances 22:43:48 23:56:34 4 3 Oct 4, 2016 3 instances 17:23:03 17:50:41 20:29:02 Nov Dec 30