Data set for the Annualized Listing Rate analysis. Data columns include: Year and Year_C, Init (number of species initiated in that year), Lst (number of species listed in that year), AdminList (number of species listed, shifted from a yearly start date of Jan 1 to Jan 20 due to presidential administrative cycles), L_Budget (US Fish & Wildlife annual listing budget in millions of $ adjusted for inflation to the value in 2014), Candidates (the number of candidate species for that year), Admin (the presidential administration including: RR: Ronald Reagan; GHB: George H W Bush; BC: William (Bill) Clinton; GWB: George W Bush; BO: Barack Obama); Phase (the policy phase as described in the text).