why queries rejected?

[pyh at mail.nsbeta.info]

Hi, 

I saw this piece from named.stats: 

[XXX.com]
              812922 auth queries rejected
                 116 recursive queries rejected
                   4 transfer requests rejected
                  80 update requests rejected
              922732 queries resulted in successful answer
              947383 queries resulted in authoritative answer
               23633 queries resulted in nxrrset
                1018 queries resulted in NXDOMAIN
                  77 requested transfers completed
                  38 updates completed 


The first line shows there is 812922 auth queries rejected.
Where there are so many queries which were rejected by bind? 

Thanks.