CREATE TABLE table_75243 ("Rank" FLOAT, "Name" TEXT, "Headquarters" TEXT, "Primary industry" TEXT, "Market value  (  USD million ) " FLOAT)

How many ranks have an industry of health care?
SELECT COUNT("Rank") FROM table_75243 WHERE "Primary industry" = 'health care'
SELECT COUNT("Rank") FROM "table_75243" WHERE "Primary industry" = 'health care'