Per-zone statistics out of BIND

I have the BIND9 application working and the graphs are great.

Given the configuration at https://docs.librenms.org/#Extensions/Applications/#bind9-aka-named :

options {
    ...
    statistics-file "/var/run/named/stats";
    zone-statistics yes;
    ...
};

I expected per-zone statistics. /var/run/named/stats contains a section titled ‘++ Per Zone Query Statistics ++’

Other statistics are being graphed, but I do not see anything zone-specific.

Should I be expecting this? If you have zone-specific graphs, can you show us a screen shot please?