18 instances from 6 years 2021 - 1 instance Jan Feb Mar Apr May Jun 26 Jul Aug Sep Oct Nov Dec 2020 - 2 instances Jan 19 Feb Mar Apr May Jun Jul Aug Sep Oct Nov 12 Dec 2019 - 1 instance Jan Feb Mar Apr May Jun Jul Aug Sep Oct 27 Nov Dec 2018 - 4 instances Jan 4 Feb Mar Apr May Jun 28 Jul 2 13 Aug Sep Oct Nov Dec 2017 - 3 instances Jan 6 Feb Mar Apr May Jun 21 Jul Aug Sep Oct 8 Nov Dec 2016 - 7 instances Jan Feb Mar Apr May Jun 20 3 Jun 20, 2016 3 instances 13:57:25 17:48:22 22:34:16 21 Jul Aug Sep 19 2 Sep 19, 2016 2 instances 16:07:57 18:02:10 Oct 3 Nov Dec