This is BibTeX, Version 0.99c (Web2C 7.3.1)
The top-level auxiliary file: sample.aux
The style file: plainnat.bst
Database file #1: sample.bib
You've used 2 entries,
            2633 wiz_defined-function locations,
            583 strings with 4958 characters,
and the built_in function-call counts, 817 in all, are:
= -- 76
> -- 30
< -- 2
+ -- 11
- -- 9
* -- 55
:= -- 141
add.period$ -- 6
call.type$ -- 2
change.case$ -- 10
chr.to.int$ -- 2
cite$ -- 2
duplicate$ -- 40
empty$ -- 70
format.name$ -- 13
if$ -- 164
int.to.chr$ -- 1
int.to.str$ -- 1
missing$ -- 3
newline$ -- 16
num.names$ -- 8
pop$ -- 19
preamble$ -- 1
purify$ -- 9
quote$ -- 0
skip$ -- 31
stack$ -- 0
substring$ -- 37
swap$ -- 2
text.length$ -- 0
text.prefix$ -- 0
top$ -- 0
type$ -- 17
warning$ -- 0
while$ -- 8
width$ -- 0
write$ -- 31