18 instances from 4 years 2021 - 1 instance Jan Feb Mar 20 Apr May Jun Jul Aug Sep Oct Nov Dec 2019 - 1 instance Jan Feb Mar Apr May Jun Jul Aug Sep 18 Oct Nov Dec 2018 - 7 instances Jan Feb Mar Apr May Jun 21 6 Jun 21, 2018 6 instances 04:51:38 04:51:40 04:51:42 04:54:22 04:54:26 19:59:42 23 Jul Aug Sep Oct Nov Dec 2016 - 9 instances Jan Feb Mar Apr May Jun Jul Aug Sep 19 4 Sep 19, 2016 4 instances 15:47:20 15:52:58 15:53:04 15:53:28 Oct 1 2 Oct 1, 2016 2 instances 03:06:32 03:14:29 3 3 Oct 3, 2016 3 instances 21:22:49 21:24:21 21:24:21 Nov Dec