instruction: just show me the top five most common diagnoses until 2103?
response: SELECT t1.diagnosisname FROM (SELECT diagnosis.diagnosisname, DENSE_RANK() OVER (ORDER BY COUNT(*) DESC) AS c1 FROM diagnosis WHERE STRFTIME('%y', diagnosis.diagnosistime) <= '2103' GROUP BY diagnosis.diagnosisname) AS t1 WHERE t1.c1 <= 5