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_77221 ( "Date" text, "Home team" text, "Score" text, "Away team" text, "Venue" text, "Crowd" real, "Box Score" text, "Report" text )

### Question ###
What was the number of the crowd when the Wollongong Hawks were the home team?

### Accurate SQL ###

SELECT SUM("Crowd") FROM table_77221 WHERE "Home team" = 'wollongong hawks'