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2026

Current regulations

23 races

2025

Current regulations

24 races

2024

Ground-effect era

24 races

2023

Ground-effect era

22 races

2022

Ground-effect era

22 races

2021

2021 (sprint trials)

22 races

2020

2019–2020 regulations

17 races

2019

2019–2020 regulations

21 races

2018

2010–2018 regulations

21 races

2017

2010–2018 regulations

20 races

2016

2010–2018 regulations

21 races

2015

2010–2018 regulations

19 races

2014

2010–2018 regulations

19 races

2013

2010–2018 regulations

19 races

2012

2010–2018 regulations

20 races

2011

2010–2018 regulations

19 races