How many years have a conventional plan of 7%?
CREATE TABLE table_name_24 (year INTEGER, conventional_plans VARCHAR)
SELECT SUM(year) FROM table_name_24 WHERE conventional_plans = "7%"
### Context: CREATE TABLE table_name_24 (year INTEGER, conventional_plans VARCHAR) ### Question: How many years have a conventional plan of 7%? ### Answer: SELECT SUM(year) FROM table_name_24 WHERE conventional_plans = "7%"