autovacuum run but last_autovacuum is empty

[Mariel Cherkassky]

Hi,
I checked pg_stat_all_tables and I see that the last_autovacuum is empty
for all the tables but in the database`s log I see that autovacuum was
running and deleted records(not all of them but still deleted...).
Can someone explain why the pg_stat_all_tables doesnt show the real data ?