Table schema:
CREATE TABLE table_25983027_1 (evapotranspiration__km_3__year_ VARCHAR, rainfall_by_volume__km_3__year_ VARCHAR)

Question: In the region where the rainfall by volume (km 3 /year) was 13.2, what was the evapotranspiration (km 3 /year)?
SQL: SELECT evapotranspiration__km_3__year_ FROM table_25983027_1 WHERE rainfall_by_volume__km_3__year_ = "13.2"