Annual nets distributed

The annual number of nets distributed to maintain the input equilibrium nets per capita. This is for the specific "smoothed" case where we assume that 1/3 of the population at risk is distributed nets every 3 years (this is equivalent to a smoothed 3 yearly whole population distribution). This version is a simplified approximation with 3 values for proportion of nets remaining (1, 2, 3 years) scraped from Bhatt et al, 2015. We use this approach for consistency with GTS. For a full approach with more updated fits see annual_net_distibuted. This newer approach is slightly more optimistic than this approach (although overall uncertainty in these projections is large).

annual_net_distibuted_gts(eq_npc)

Arguments

eq_npc	Equilibrium nets per capita