Total number of starts across all sessions.

Series ordered by the percentage of time slots with official sessions, the number of splits, and number of drivers per timeslot. Format: Slots% (Avg Splits)

Compares participation in the last 3 months vs participation in the 3 previous months as a percentage. A positive number means series is getting more popular. Only series with 6 or more race weeks in the season are included and Week 13 is filtered out.

Series in Strength of Field order. Find out where the experts race!