Table: race_stats_38
Columns: year
starts
wins
top_5
top_10
poles
avg_start
avg_finish
winnings
position
team_s

Question: What was the highest number of starts in 2007 when the average start was over 17.6?
SQL: SELECT MAX("starts") FROM race_stats_38 WHERE "year" = 2007 AND "avg_start" > 17.6