instruction: what are the five most frequently occurring specimen tests in the last year?
response: SELECT t1.culturesite FROM (SELECT microlab.culturesite, DENSE_RANK() OVER (ORDER BY COUNT(*) DESC) AS c1 FROM microlab WHERE DATETIME(microlab.culturetakentime, 'start of year') = DATETIME(CURRENT_TIME(), 'start of year', '-1 year') GROUP BY microlab.culturesite) AS t1 WHERE t1.c1 <= 5