96 instances from 9 years 2025 - 1 instance Jan Feb Mar Apr 25 May Jun Jul Aug Sep Oct Nov Dec 2024 - 3 instances Jan 24 Feb Mar Apr 19 May Jun Jul Aug Sep Oct 19 Nov Dec 2023 - 4 instances Jan 17 Feb Mar Apr 27 May Jun Jul 27 Aug Sep Oct 12 Nov Dec 2022 - 5 instances Jan 16 Feb 3 Mar Apr 18 May Jun Jul 20 Aug Sep Oct 29 Nov Dec 2021 - 24 instances Jan 30 24 16 10 2 1 Feb 27 22 14 7 1 Mar 27 21 13 6 1 Apr 15 2 May 2 Jun 2 Jul 4 Aug 2 Sep 3 Oct 16 Nov Dec 2020 - 48 instances Jan 15 Feb Mar Apr 13 May 31 23 21 16 9 2 1 Jun 27 21 13 6 1 Jul 26 18 15 11 5 1 Aug 29 23 15 8 2 1 Sep 26 20 13 5 1 Oct 31 25 18 14 11 3 1 Nov 29 21 15 7 1 Dec 26 19 12 6 1 2019 - 9 instances Jan 15 Feb Mar Apr 4 3 May 7 Jun 14 Jul 8 Aug Sep Oct 9 Nov 30 14 Dec 2018 - 1 instance Jan Feb Mar Apr 3 May Jun Jul Aug Sep Oct Nov Dec 2017 - 1 instance Jan Feb Mar Apr May Jun Jul Aug Sep Oct 3 Nov Dec