What is the HDI for 2011 in Tunisia? 
CREATE TABLE table_2155836_1 (hdi__2011_ VARCHAR, country VARCHAR)
SELECT hdi__2011_ FROM table_2155836_1 WHERE country = "Tunisia"
### Context: CREATE TABLE table_2155836_1 (hdi__2011_ VARCHAR, country VARCHAR) ### Question: What is the HDI for 2011 in Tunisia?  ### Answer: SELECT hdi__2011_ FROM table_2155836_1 WHERE country = "Tunisia"