What is the gdp per capita in 2008 for the region that had a combined gross enrollment ration of 89.0?
create table table_25042332_33 (gdp__ppp__per_capita__2008_ integer, combined_gross_enrollment_ratio__2009_ varchar, PRIMARY KEY (gdp__ppp__per_capita__2008_))
select min(gdp__ppp__per_capita__2008_) from table_25042332_33 where combined_gross_enrollment_ratio__2009_ = "89.0"