20 instances from 6 years 2020 - 3 instances Jan 22 Feb Mar Apr May Jun Jul 2 Aug Sep Oct Nov 19 Dec 2019 - 1 instance Jan Feb 18 Mar Apr May Jun Jul Aug Sep Oct Nov Dec 2018 - 3 instances Jan Feb Mar Apr May Jun 21 24 27 Jul Aug Sep Oct Nov Dec 2017 - 3 instances Jan 8 Feb Mar Apr May Jun 23 Jul Aug Sep Oct Nov Dec 29 2016 - 9 instances Jan Feb 17 Mar Apr May Jun 22 2 Jun 22, 2016 2 instances 01:36:03 15:31:16 Jul Aug Sep 20 Oct 1 4 3 Oct 4, 2016 3 instances 16:16:28 16:51:51 19:31:10 Nov Dec 30 2015 - 1 instance Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 16