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_70323 ( "Player" text, "Height" real, "Position" text, "Year born" real, "Current Club" text )

### Question ###
Name the sum of year for olimpija ljubljana with height less than 2.04

### Accurate SQL ###

SELECT SUM("Year born") FROM table_70323 WHERE "Current Club" = 'olimpija ljubljana' AND "Height" < '2.04'