20 instances from 5 years 2021 - 1 instance Jan Feb Mar Apr May Jun 28 Jul Aug Sep Oct Nov Dec 2020 - 2 instances Jan 20 Feb Mar Apr May Jun Jul Aug Sep Oct Nov 14 Dec 2019 - 3 instances Jan Feb Mar Apr May Jun 22 Jul 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 22 Jul Aug Sep 20 4 Sep 20, 2016 4 instances 16:01:48 16:50:50 21:32:41 21:50:12 Oct 1 2 Oct 1, 2016 2 instances 22:43:01 23:55:47 4 3 Oct 4, 2016 3 instances 17:22:17 17:49:54 20:28:15 Nov Dec 30