All that information is dependent on available memory in the ASA (or atleast for NAT, BGP, OSPF, Static Routes) as for security zones I am assuming this is also dependent on memory but I am not 100% sure on that.
But it is because of the dependency on memory that it is not documented anywhere as you are able to upgrade the memory of the ASA thereby being able to have more entries of each.
I had a similar situation, but this was with IOS zone based firewalls, where I had to contact TAC in order to get an exact number in relation to the amount of memory the device had. And even then it wasn't an easy thing to get as the TAC engineer had to contact the development team to get the answer.
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