21 instances from 5 years 2020 - 2 instances Jan Feb Mar Apr May Jun 28 Jul 4 Aug Sep Oct Nov Dec 2019 - 1 instance Jan Feb Mar Apr May Jun Jul 20 Aug Sep Oct Nov Dec 2018 - 3 instances Jan Feb Mar Apr May Jun 21 3 Jun 21, 2018 3 instances 05:17:08 05:20:26 05:23:17 Jul Aug Sep Oct Nov Dec 2017 - 5 instances Jan 6 Feb Mar Apr May Jun 21 2 Jun 21, 2017 2 instances 05:15:11 05:20:17 Jul Aug Sep Oct 2 Nov Dec 25 2016 - 10 instances Jan Feb Mar Apr May Jun Jul Aug Sep 19 4 Sep 19, 2016 4 instances 10:49:18 10:53:40 10:53:44 10:54:25 30 2 Sep 30, 2016 2 instances 18:56:41 19:02:10 Oct 3 3 Oct 3, 2016 3 instances 10:59:49 10:59:50 10:59:54 Nov Dec 29