20 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 12 Dec 2019 - 2 instances Jan Feb Mar Apr May Jun Jul 20 Aug Sep 18 Oct Nov Dec 2018 - 7 instances Jan 4 2 Jan 4, 2018 2 instances 21:21:45 21:29:36 5 8 Feb Mar Apr May Jun 29 Jul 1 12 Aug Sep Oct Nov Dec 2017 - 7 instances Jan 6 Feb Mar Apr May Jun 21 Jul Aug 29 3 Aug 29, 2017 3 instances 15:54:18 16:11:04 16:21:13 Sep Oct 6 Nov Dec 27 2016 - 1 instance Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 29