Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_2155836_1 ( hdi__2011_ VARCHAR, country VARCHAR )

### Question ###
What is the HDI for 2011 in Tunisia?

### Accurate SQL ###

SELECT hdi__2011_ FROM table_2155836_1 WHERE country = "Tunisia"