Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_name_12 ( goals_per_match VARCHAR, name VARCHAR )

### Question ###
What is Cha Bum-Kun's average number of goals per match?

### Accurate SQL ###

SELECT COUNT(goals_per_match) FROM table_name_12 WHERE name = "cha bum-kun"