What is the population in millions for 2011 where the HDI for 2011 is 0.453 (low)?
create table table_2155836_1 (population__millions varchar, _2011_ varchar, hdi__2011_ varchar, PRIMARY KEY (population__millions))
select population__millions, _2011_ from table_2155836_1 where hdi__2011_ = "0.453 (low)"