So 1000 coins per block found.
Yet, I see this in the explorer.

7983   4d06ead910b6ea01c8d8554dd82eb1f655ac3b5da35df03678674c27d00952f5   7   21000.00000000   Fri, 11 May 2018 02:55:01 GMT

21,000 coins for block 7983

Can someone please explain how this works?