List the countries of universities that scored 70 and below in 2016.
scored 70 and below refers to score < 70; in 2016 refers to year = 2016
SELECT DISTINCT T3.country_name FROM university AS T1 INNER JOIN university_ranking_year AS T2 ON T1.id = T2.university_id INNER JOIN country AS T3 ON T3.id = T1.country_id WHERE T2.score < 70 AND T2.year = 2016