CREATE TABLE table_name_86 (goals__2008_ VARCHAR(255), age_at_debut VARCHAR(255), games__2008_ VARCHAR(255), debut_round VARCHAR(255))
What is the total number of goals that have games under 11, debut round over 15, and age of 20 years, 71 days?
    
SQL: SELECT COUNT(goals__2008_) FROM table_name_86 WHERE games__2008_ < 11 AND debut_round > 15 AND age_at_debut = "20 years, 71 days"