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_88 (Id VARCHAR)

### Question ###
What is the 2000 number when the 1969 is 54.3, and the 1979 is less than 48.4?

### Accurate SQL ###

SELECT SUM(2000) FROM table_name_88 WHERE 1969 = 54.3 AND 1979 < 48.4