20 instances from 6 years 2021 - 1 instance Jan Feb Mar Apr May Jun 26 Jul Aug Sep Oct Nov Dec 2020 - 3 instances Jan Feb Mar Apr May Jun 28 Jul Aug Sep Oct Nov 13 21 Dec 2019 - 2 instances Jan Feb Mar Apr May Jun 22 Jul Aug Sep 18 Oct Nov Dec 2018 - 1 instance Jan 8 Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 2017 - 5 instances Jan 1 9 Feb Mar Apr May Jun 30 Jul Aug 29 2 Aug 29, 2017 2 instances 15:54:42 17:23:14 Sep Oct Nov Dec 2016 - 8 instances Jan Feb Mar Apr May Jun Jul Aug Sep 20 4 Sep 20, 2016 4 instances 16:06:13 16:55:16 21:37:21 21:54:50 Oct 1 4 3 Oct 4, 2016 3 instances 16:07:46 16:42:26 19:22:25 Nov Dec