20 instances from 5 years 2021 - 1 instance Jan Feb Mar Apr May Jun 27 Jul Aug Sep Oct Nov Dec 2020 - 3 instances Jan 21 Feb Mar Apr May Jun Jul Aug Sep Oct Nov 13 21 Dec 2018 - 1 instance Jan 8 Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 2017 - 3 instances Jan 1 10 Feb Mar Apr May Jun Jul 2 Aug Sep Oct Nov Dec 2016 - 12 instances Jan Feb Mar Apr May Jun 20 21 3 Jun 21, 2016 3 instances 09:18:05 09:37:05 10:00:03 Jul Aug Sep 19 3 Sep 19, 2016 3 instances 15:49:33 16:32:52 18:05:30 30 2 Sep 30, 2016 2 instances 21:57:57 23:06:59 Oct 3 3 Oct 3, 2016 3 instances 15:11:43 15:25:42 16:09:19 Nov Dec