http://www.pittsburghlive.com/x/pittsburghtrib/news/cityregion/s_605320.html
And speaking strictly of recent years and Greene county in particular, the human population in 1990 was 39,550. The population in 2007 was 39,503.
http://www.factfinder.census.gov/servlet/SAFFPopulation?geo_id=05000US42059&_state=0400 0US42&pctxt=cr
.....Cough!...Cough!....Ahem.... Now...About those deer.