21 instances from 5 years 2021 - 1 instance Jan Feb Mar Apr May Jun 26 Jul Aug Sep Oct Nov Dec 2020 - 2 instances Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov 13 16 Dec 2018 - 3 instances Jan 12 Feb Mar Apr May Jun Jul 12 13 Aug Sep Oct Nov Dec 2017 - 3 instances Jan 8 Feb Mar Apr May Jun 23 Jul Aug Sep Oct 9 Nov Dec 2016 - 12 instances Jan Feb Mar Apr May Jun 21 22 Jul Aug Sep 20 4 Sep 20, 2016 4 instances 16:01:26 16:50:32 21:32:22 21:49:53 Oct 1 2 Oct 1, 2016 2 instances 22:42:40 23:55:25 4 3 Oct 4, 2016 3 instances 17:21:55 17:49:32 20:27:54 Nov Dec 30