21 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 1 Aug Sep Oct Nov 14 Dec 2019 - 3 instances Jan Feb Mar Apr May Jun Jul 20 Aug Sep 18 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 2 Jun 21, 2016 2 instances 11:11:08 19:21:27 22 Jul Aug Sep 20 4 Sep 20, 2016 4 instances 14:53:06 15:27:30 20:24:00 20:40:54 Oct 1 4 3 Oct 4, 2016 3 instances 16:00:24 16:35:06 19:15:01 Nov Dec 30