According to an article from the Washington Post from 2009 the CDC published figures on pet related falls in households. An average of 86,629 Americans fall each year, caused by a pet. 88% were related to Dogs. That are approx. 240 Emergency Room trips per day. 
Watch your step...

https://www.washingtonpost.com/wp-dyn/content/article/2009/03/26/AR2009032601634.html