SCHEMA:
CREATE TABLE table_name_78 (Id VARCHAR)
USER:
What is the highest value for 2000, when the value for 1950 is 3.5, and when the value for 1970 is greater than 3.4?

QUERY:
SELECT MAX(2000) FROM table_name_78 WHERE 1950 = 3.5 AND 1970 > 3.4