Data of the Police Headquarters from the Traffic Casualties and Clashes System (SEWIK). Year 2020: first quarter as of 28th April 2020, first half-year as of 20th July 2020, three quarters as of 27th October 2020, year 2020 as of 14th February 2021. Year 2021: first quarter as of 21th April 2021, first half-year as of 20th July 2021, three quarters as of 21th October 2021, year 2021 as of 13th February 2022. Year 2022: first quarter as of 22th April 2022, first half-year as of 25th July 2022, three quarters as of 26th October 2022, year 2022 as of 16th February 2023. Year 2023: first quarter as of 21th April 2023, first half-year as of 21th July 2023, three quarters as of 23th October 2023, year 2023 as of 7th February 2024. Year 2024: first quarter as of 23th April 2024, first half-year as of 24th July 2023, three quarters as of 22nd October 2024. Year 2024 as of 15th February 2025, I kwartał 2025 r. first quarter as of 22nd April 2025 r.,first half-year 2025 as of 22nd July 2025 r., three quarters as of 21st October 2025 r.,Year 2025 as of 15th February 2026, first quarter as of 21st April 2026 r.,first half-year 2026 as of 15th July 2026 r.