Table schema:
CREATE TABLE table_name_66 (Id VARCHAR)

Question: What is the lowest value for 1960, when the value for 2000 is less than 8.4, when the value for 1950 is greater than 3.5, and when the value for 1990 is less than 3.3?
SQL: SELECT MIN(1960) FROM table_name_66 WHERE 2000 < 8.4 AND 1950 > 3.5 AND 1990 < 3.3