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_18 ( loses INTEGER, wins VARCHAR, draws VARCHAR, year VARCHAR, competition VARCHAR )

### Question ###
What sum of Losses has Year greater than 1972, and Competition of nswrfl, and Draws 0, and Wins 16?

### Accurate SQL ###

SELECT SUM(loses) FROM table_name_18 WHERE year > 1972 AND competition = "nswrfl" AND draws = 0 AND wins = 16