*Cattle, buffaloes, goats, and sheep.
Livestock totals were predicted using FAOSTAT world livestock data from 1961-2016. See FAOSTAT Methods & Standards for details on how livestock numbers are assessed. We estimated livestock totals in 2017 and 2018 separately for each species using non-seasonal Holt-Winters exponential smoothing models. The counter assumes a linear increase in livestock numbers from 2017 to 2018.
Livestock counter developed by Chris Wolf () and William Ripple ().