[Plugin: W3 Total Cache] Help me understand database caching ratio

A little info for dummies would be appreciated. I would like to get a basic understanding of database caching. For instance, most pages on my site, at the bottom of page source, W3TC info, have something like:

Minified using disk
Page Caching using disk (enhanced)
Database Caching 13/65 queries in 0.008 seconds using disk
Object Caching 1953/2025 objects using disk
Content Delivery Network via………..

However, for my home page it just reads:

Minified using disk
Page Caching using disk (enhanced)
Database Caching using disk
Object Caching 1500/1586 objects using disk
Content Delivery Network via………

No queries? Help me understand?

OK…Let me put it another way:

What is the difference between a page source that reads:

“Database Caching 13/65 queries in 0.008 seconds using disk”

and one that simply reads:

“Database Caching using disk”

It just means at the time the cache was made it wasn’t able to gather the stats to write it to the cached file.