Table: warwick_racing_stats
Columns: year
entrant
chassis
engine
points

Question: Which year has a total of 0 points and a chassis of Toleman tg181?
SQL: SELECT AVG("year") FROM warwick_racing_stats WHERE "points" = 0 AND "chassis" = 'toleman tg181'

Question: What is the latest year that has more than 5 points and a renault ef15 1.5 v6 t engine?
SQL: SELECT MAX("year") FROM warwick_racing_stats WHERE "engine" = 'renault ef15 1.5 v6 t' AND "points" > 5

Question: Which year had a toleman tg183 chassis?
SQL: SELECT COUNT("year") FROM warwick_racing_stats WHERE "chassis" = 'toleman tg183'