Now that the season is wrapping up...time to revisit...

NWSMT:

11 races
26 drivers started at least one race (tough to know because the standings have duplicates)

8 drivers started all 11
1 driver started 9
2 drivers started 8
1 driver started 7
2 drivers started 6
3 drivers started 4
4 drivers started 2
5 drivers started 1

If I exclude the Bristol race, there were 10 races held
High car count: 17 (twice)
Low car count: 11 (once)
Average car count: 14.3
Standard deviation: 2.4