What was the US national average electric mix rating for the vehicle that was rated 280 g/mi (174 g/km) in the Midwest?
CREATE TABLE table_16105186_2 (us_national_average_electric_mix VARCHAR, midwest__des_moines_ VARCHAR)
SELECT us_national_average_electric_mix FROM table_16105186_2 WHERE midwest__des_moines_ = "280 g/mi (174 g/km)"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_16105186_2 (us_national_average_electric_mix VARCHAR, midwest__des_moines_ VARCHAR) Question: What was the US national average electric mix rating for the vehicle that was rated 280 g/mi (174 g/km) in the Midwest? [/INST] SELECT us_national_average_electric_mix FROM table_16105186_2 WHERE midwest__des_moines_ = "280 g/mi (174 g/km)" </s>