instruction: tell me what are the five most common diagnoses of patients in the 60 or above in 2101?
response: SELECT t1.diagnosisname FROM (SELECT diagnosis.diagnosisname, DENSE_RANK() OVER (ORDER BY COUNT(*) DESC) AS c1 FROM diagnosis WHERE diagnosis.patientunitstayid IN (SELECT patient.patientunitstayid FROM patient WHERE patient.age >= 60) AND STRFTIME('%y', diagnosis.diagnosistime) = '2101' GROUP BY diagnosis.diagnosisname) AS t1 WHERE t1.c1 <= 5