Delete Observations that have no partners in panel data

Hello..

i am new in here

i got some problem in using STATA

i am trying to make panel data but not every observations have complete year data


--------------------------------------
copies | observations surplus
----------+---------------------------
1 | 583 0
2 | 2134 1067
3 | 2052 1368
4 | 4148 3111
5 | 10095 8076
--------------------------------------

so I want to delete observations that only have 1 to 4 copies, i only need observation with 5 copies.

I am very grateful if anyone can help me

thx