What year is the happy planet index?
CREATE TABLE table_name_79 (year INTEGER, index VARCHAR)
SELECT SUM(year) FROM table_name_79 WHERE index = "happy planet index"
### Context: CREATE TABLE table_name_79 (year INTEGER, index VARCHAR) ### Question: What year is the happy planet index? ### Answer: SELECT SUM(year) FROM table_name_79 WHERE index = "happy planet index"