20 instances from 5 years 2021 - 1 instance Jan Feb Mar Apr May Jun 26 Jul Aug Sep Oct Nov Dec 2020 - 3 instances Jan 19 Feb Mar Apr May Jun Jul 2 Aug Sep Oct Nov 14 Dec 2019 - 2 instances Jan Feb Mar Apr May Jun 22 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 - 12 instances Jan Feb Mar Apr May Jun 22 23 24 Jul Aug Sep 20 3 Sep 20, 2016 3 instances 15:19:13 16:09:50 21:08:27 Oct 1 2 Oct 1, 2016 2 instances 21:59:00 23:13:10 4 3 Oct 4, 2016 3 instances 16:34:23 17:06:37 19:44:22 Nov Dec 30