tell me the lab tests until 2101 that were five most common?
select d_labitems.label from d_labitems where d_labitems.itemid in ( select t1.itemid from ( select labevents.itemid, dense_rank() over ( order by count(*) desc ) as c1 from labevents where strftime('%y',labevents.charttime) <= '2101' group by labevents.itemid ) as t1 where t1.c1 <= 5 )