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_29 ( top_5 INTEGER, position VARCHAR, year VARCHAR )

### Question ###
Name the average Top 5 which has a Position of 52nd with a Year smaller than 2000?

### Accurate SQL ###

SELECT AVG(top_5) FROM table_name_29 WHERE position = "52nd" AND year < 2000