52 instances from 9 years 2025 - 1 instance Jan Feb Mar Apr May 24 Jun Jul Aug Sep Oct Nov Dec 2024 - 2 instances Jan Feb Mar Apr May 28 Jun Jul Aug Sep Oct Nov 28 Dec 2023 - 2 instances Jan Feb Mar Apr May 23 Jun Jul Aug Sep Oct Nov 23 Dec 2022 - 3 instances Jan 14 Feb Mar Apr May 16 Jun Jul Aug Sep Oct Nov 29 Dec 2021 - 15 instances Jan 29 22 15 8 1 Feb Mar 1 Apr 1 May 18 1 Jun 1 Jul 1 Aug 1 Sep 1 Oct Nov 15 1 Dec 2020 - 22 instances Jan Feb Mar Apr May 21 1 Jun 1 Jul 1 Aug 1 Sep 25 18 1 Oct 30 23 16 9 2 Nov 27 20 16 13 6 Dec 25 18 11 4 2019 - 3 instances Jan Feb Mar Apr May 6 Jun Jul Aug Sep Oct Nov 30 14 Dec 2018 - 2 instances Jan Feb Mar Apr May 3 Jun Jul Aug Sep Oct Nov 14 Dec 2017 - 2 instances Jan Feb Mar Apr May 6 Jun Jul Aug Sep Oct Nov 6 Dec