In how many importing nations is 10 3 m 3 /day (2006) equivalent to 150? 
CREATE TABLE "import" (
  "num" real,
  "importing_nation" text,
  "10_3_bbl_day_2011" real,
  "10_3_m_3_day_2011" real,
  "10_3_bbl_day_2009" real,
  "10_3_m_3_day_2009" real,
  "10_3_bbl_day_2006" real,
  "10_3_m_3_day_2006" real
);
SELECT COUNT("importing_nation") FROM "import" WHERE "10_3_m_3_day_2006"=150;