16 instances from 4 years 2020 - 1 instance Jan Feb Mar Apr May Jun Jul 24 Aug Sep Oct Nov Dec 2019 - 1 instance Jan Feb Mar Apr May Jun Jul Aug Sep 18 Oct Nov Dec 2018 - 6 instances Jan Feb Mar Apr May Jun 21 6 Jun 21, 2018 6 instances 05:34:18 10:07:38 10:41:17 10:53:05 18:32:35 20:20:51 Jul Aug Sep Oct Nov Dec 2016 - 8 instances Jan Feb Mar Apr May Jun Jul Aug Sep 19 4 Sep 19, 2016 4 instances 10:24:45 10:30:21 10:30:29 10:30:40 30 Oct 3 3 Oct 3, 2016 3 instances 12:15:44 12:15:47 12:17:50 Nov Dec