filename: 500
hash function: crc32
total buckets:       32768
total tuples:        10020 (30.58%)
used buckets:        9255 (28.24%)
maximum list length: 2
average list length: 1.08
hash cost per tuple: 191 cyc, 385 ns, 3 Mhz on 497 Mhz CPU (INNER)
Count	Length	CT
765	2	15.27%
8490	1	100.00%
23513	0	100.00%