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 races (raceid VARCHAR, name VARCHAR)
TABLE: CREATE TABLE results (raceid VARCHAR)

### Question ###
How many drivers participated in the race Australian Grand Prix held in 2009?

### Accurate SQL ###

SELECT COUNT(*) FROM results AS T1 JOIN races AS T2 ON T1.raceid = T2.raceid WHERE T2.name = "Australian Grand Prix" AND YEAR = 2009