21 instances from 6 years 2021 - 1 instance Jan Feb Mar Apr May Jun 26 Jul Aug Sep Oct Nov Dec 2020 - 2 instances Jan 22 Feb Mar Apr May Jun Jul Aug Sep Oct Nov 13 Dec 2019 - 1 instance Jan Feb Mar Apr May Jun 22 Jul Aug Sep Oct Nov Dec 2018 - 2 instances Jan 13 Feb Mar Apr May Jun Jul 13 Aug Sep Oct Nov Dec 2017 - 2 instances Jan 8 Feb Mar Apr May Jun Jul 2 Aug Sep Oct Nov Dec 2016 - 13 instances Jan Feb Mar Apr May Jun 20 3 Jun 20, 2016 3 instances 14:03:53 17:39:36 21:09:28 21 Jul Aug Sep 19 3 Sep 19, 2016 3 instances 15:52:59 16:36:14 18:08:59 30 2 Sep 30, 2016 2 instances 22:01:28 23:10:27 Oct 3 3 Oct 3, 2016 3 instances 15:15:08 15:29:07 16:12:44 Nov Dec 30