Fig. 3
From: Spatial analysis and characteristics of pig farming in Thailand
Temporal distribution pattern of pig population. Top shows comparisons between human and pig populations in Thailand over the past 50 years (1964–2013), which bar plot shows the number of human population (left y-axis) and line plot shows the number of pig population (right y-axis). Left bottom shows trends in numbers of pig holders in Thailand over the past 10 years. Right bottom shows an average size of pig holding in Thailand over the past 10 years