20 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 30 Jul Aug Sep Oct Nov 14 Dec 2019 - 3 instances Jan Feb Mar Apr May Jun 22 Jul 20 Aug Sep Oct 26 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 15:35:50 16:26:24 21:07:14 21:24:55 Oct 1 2 Oct 1, 2016 2 instances 22:16:17 23:30:03 4 3 Oct 4, 2016 3 instances 16:54:57 17:24:00 20:01:42 Nov Dec 30