What is the HDI for 2011 in Tunisia? 
CREATE TABLE "members" (
  "country" text,
  "area_km" text,
  "population_millions_2011" text,
  "gdp_ppp_usd_per_capita" real,
  "gdp_nominal_billions_usd" text,
  "hdi_2011" text
);
SELECT "hdi_2011" FROM "members" WHERE "country"='Tunisia';