Distribution of countries/blocks across the period of analysis, by Region – (A) by out-degree category and (B) by in-degree category. All results are detailed separately for the 3 networks: live poultry lighter than 185 g from 2004 to 2016, live poultry of 185 g or more from 2004 to 2016 and poultry hatching eggs from 2012 to 2016.