19 instances from 6 years 2021 - 1 instance Jan Feb Mar Apr May Jun 26 Jul Aug Sep Oct Nov Dec 2020 - 4 instances Jan 22 Feb Mar Apr May Jun 28 Jul Aug Sep Oct Nov 13 21 Dec 2019 - 2 instances Jan Feb Mar Apr May Jun Jul Aug Sep 18 Oct 26 Nov Dec 2018 - 1 instance Jan 4 Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 2017 - 2 instances Jan 8 Feb Mar Apr May Jun 25 Jul Aug Sep Oct Nov Dec 2016 - 9 instances Jan Feb Mar Apr May Jun Jul Aug Sep 20 4 Sep 20, 2016 4 instances 14:16:32 14:52:31 19:47:03 20:04:57 Oct 1 4 3 Oct 4, 2016 3 instances 16:08:29 16:43:53 19:23:08 Nov Dec 30