You should be able to include floats by changing the -sum flag under options. To quote the help page:
Code: Select all
-sum, -sum= Make sum of all word and equation counts. May also
use -sum=#[,#] with up to 7 numbers to indicate how
each of the counts (text words, header words, caption
words, #headers, #floats, #inlined formulae,
#displayed formulae) are summed. The default sum (if
only -sum is used) is the same as -sum=1,1,1,0,0,1,1.
So -sum=1,1,1,1,1,1,1 should make it include everything, including floats and headers.
(If for some reason you only wanted a count in floats, you could use -sum=0,0,0,0,1,0,0.