CREATE TABLE table_13388681_1 (to_par VARCHAR(255), country VARCHAR(255), winning_score VARCHAR(255))
What is the number of "to par" in Mexico with a winning score of 67-67-69-70=273?
    
SQL: SELECT to_par FROM table_13388681_1 WHERE country = "Mexico" AND winning_score = 67 - 67 - 69 - 70 = 273