20 instances from 5 years 2020 - 1 instance Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov 16 Dec 2019 - 1 instance Jan Feb Mar Apr May Jun Jul 20 Aug Sep Oct Nov Dec 2018 - 1 instance Jan 11 Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 2017 - 5 instances Jan 7 Feb Mar Apr May Jun 22 Jul Aug Sep Oct 3 Nov Dec 25 27 2016 - 12 instances Jan Feb Mar Apr May Jun 20 4 Jun 20, 2016 4 instances 09:19:41 11:13:56 11:20:23 12:21:01 Jul Aug Sep 19 3 Sep 19, 2016 3 instances 09:08:16 09:33:17 09:48:23 30 2 Sep 30, 2016 2 instances 17:04:37 17:33:12 Oct 3 2 Oct 3, 2016 2 instances 09:39:35 09:50:24 Nov Dec 30