[ccp4bb] unique structures

[Sandra Quarantini]

HI! Does anybody know the number or a likely number of unique structures 
(solved by Xray) deposited in PDB every year???? (Unique structures I mean  
less than 30% identical in sequence to proteins for which structures had 
already been determined)
I could not find this data ın PDB . Is eventually possible to get an estimate 
of this number by calculating the number of structures solved by MAD/SAD ...? 
thank you!!