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_25042332_33 (gdp__ppp__per_capita__2008_ INTEGER, combined_gross_enrollment_ratio__2009_ VARCHAR)

### Question ###
What is the gdp per capita in 2008 for the region with a combined gross enrollment ratio of 86.6 in 2009?

### Accurate SQL ###

SELECT MAX(gdp__ppp__per_capita__2008_) FROM table_25042332_33 WHERE combined_gross_enrollment_ratio__2009_ = "86.6"