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_3215 ( "Region" text, "HDI" text, "Life expectancy at birth (2001-2002)" text, "Adult literacy rate (2009)" text, "Combined gross enrollment ratio (2009)" text, "GDP (PPP) per capita (2008)" real )

### Question ###
How many regions had a life expectancy at birth in 2001-2002 of 75.9?

### Accurate SQL ###

SELECT COUNT("HDI") FROM table_3215 WHERE "Life expectancy at birth (2001-2002)" = '75.9'