Today I published the facsimile of a nice book "Die Zahl im Kriege" showing lots of tables and graphics regarding the wars of the 19th century (plus 7 years war). Unfortunately the ACW ist not covered, the reason lies in the focus on European armies.
Although the work is written in German, it may also be useful for the international community - as it is not available via google books or other online sources.
Just go to http://www.napoleon-online.de/quellen_monatsbuch.html and click on the download button at the top of the table.
Greetings from Berlin in autumn weather