20 instances from 6 years 2021 - 1 instance Jan Feb Mar Apr May Jun 26 Jul Aug Sep Oct Nov Dec 2020 - 4 instances Jan 19 Feb Mar Apr May Jun Jul 1 Aug Sep Oct Nov 12 14 Dec 2019 - 2 instances Jan Feb Mar Apr May Jun Jul Aug Sep 18 Oct 27 Nov Dec 2018 - 2 instances Jan 6 Feb Mar Apr May Jun Jul 12 Aug Sep Oct Nov Dec 2017 - 3 instances Jan 1 9 Feb Mar Apr May Jun 23 Jul Aug Sep Oct Nov Dec 2016 - 8 instances Jan Feb Mar Apr May Jun 22 24 Jul Aug Sep 22 4 Sep 22, 2016 4 instances 04:54:49 05:08:32 14:57:56 15:55:47 Oct 3 2 Oct 3, 2016 2 instances 12:59:36 14:55:04 Nov Dec