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"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_name_79 (year INTEGER, index VARCHAR) Question: What year is the happy planet index? [/INST] SELECT SUM(year) FROM table_name_79 WHERE index = "happy planet index" </s>