How many regions had a life expectancy at birth in 2001-2002 of 75.9?
create table table_25042332_33 (hdi varchar, life_expectancy_at_birth__2001_2002_ varchar, PRIMARY KEY (hdi))
select count(hdi) from table_25042332_33 where life_expectancy_at_birth__2001_2002_ = "75.9"