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_204_373 ( id number, "wager" text, "winner" text, "loser" text, "location" text, "date" text )

### Question ###
number of mocho cota matches held in mexico city in 1983 or 1984

### Accurate SQL ###

SELECT COUNT(*) FROM table_204_373 WHERE "location" = 'mexico city' AND "date" IN (1983, 1984)