CSI sub-index.

Animal Headcount Index.

Tracks the size of farmed-animal populations. A measured fall in headcount lifts the sub-index; a rise lowers it.

Back to the sub-index roster.View the CSI dashboard.

Provisional

68.06

Sub-index value for 2026.

-0.05

Change from the previous snapshot.

25/101 of the CSI · Pressure reduction. Static candidate release as of 21 August 2026. The 2026 label is the nowcast period; the stored period-end timestamp is not a future operational update.

Animal Headcount Index is one of the eight first-class sub-indexes the CSI composes. It maps onto the g20_livestock_population metric, carries a raw priority weight of 25/101 and a pressure reduction direction factor. This page drills into its latest value, history, lenses, source-native members and evidence trail. Every value is computed from real sources, carries an explicit data-state label and stays provisional until the benchmark trusted gate passes.

Latest value

Provisional

68.06

Sub-index value for 2026.

-0.05

Change from the previous snapshot.

—

Confidence score.

Static candidate release published/as-of 21 August 2026. The 2026 period-end timestamp is nowcast metadata, not a future collection or publication date.

Contribution to the CSI

Raw priority weight: 25/101, that is 25 of 101.
Direction factor: Pressure reduction (D = -1). A measured fall in this pressure lifts the sub-index.
Weighted contribution: 16.85 Provisional, the share this sub-index adds to the composed CSI for 2026.

Sub-index history

The chart uses the published series and has the same values listed in the data table below.

Sub-index history table
Period	Value	State
2000	102.399	Provisional
2001	102.317	Provisional
2002	100.695	Provisional
2003	99.080	Provisional
2004	97.409	Provisional
2005	95.369	Provisional
2006	94.085	Provisional
2007	92.610	Provisional
2008	91.007	Provisional
2009	89.229	Provisional
2010	88.125	Provisional
2011	87.420	Provisional
2012	86.712	Provisional
2013	85.654	Provisional
2014	84.781	Provisional
2015	83.351	Provisional
2016	81.962	Provisional
2017	80.143	Provisional
2018	79.369	Provisional
2019	79.588	Provisional
2020	77.276	Provisional
2021	74.276	Provisional
2022	71.276	Provisional
2023	68.276	Provisional
2024	68.174	Provisional
2025	68.112	Provisional
2026	68.062	Provisional

This sub-index is oriented to the CSI, so it falls as livestock head-counts rises. A declining line means the real-world metric is increasing, which records more animal-agriculture pressure and lowers the CSI. The inversion allows the sub-index to enter the CSI; it does not mean the activity itself is shrinking.

Head count by species group, indexed to 2000 = 100

A representation of the head-count component: chickens are a species inside the head-count index (they flow into it via the per-species geometric mean), not a separate index and never double-counted into the CSI. Chickens are roughly 84% of all farmed land animals by head and drive the basket’s rise. This is why the head-count line tracks feed.

View data table (chickens vs mammals)

Head count by species group, indexed to 2000 = 100 (FAOSTAT). Chickens are normalised to head; both groups flow into the single head-count index.
Year	Chickens	Mammals
2000	100.0	100.0
2001	103.9	99.4
2002	112.3	100.0
2003	112.7	101.1
2004	116.8	102.6
2005	120.2	104.5
2006	123.0	105.6
2007	128.1	106.7
2008	133.0	107.6
2009	138.7	108.5
2010	142.4	108.8
2011	140.7	109.8
2012	144.7	111.2
2013	148.2	112.4
2014	149.6	113.2
2015	155.0	114.6
2016	160.1	115.9
2017	174.9	116.6
2018	177.9	116.8
2019	182.6	115.9
2020	184.0	120.3
2021	185.0	123.0
2022	189.3	124.7
2023	192.0	125.5

Lenses

The CSI consumes the canonical sub-index. A lens is a filtered view for inspection and is never counted into the CSI a second time.

Canonical sub-index (canonical) · showing

Scope

Artefact lens id: g20 · member scope: WORLD; the lens id and measured member scope differ. The members are WORLD-scope observations, and the CSI consumes this canonical sub-index.

Evidence trail

Methodology version: csi-v1.1.0 · sub-indexes sub-indexes-v1.0.0
Methodology hash: sha256:4eeec13bdb90c15fffc0a0ae73cbc8e42b771dc9b2e79ae6efb4de3109ef904d
Source bundle hash: sha256:118f33da6800532c4405d7bdee6247092b709c3a5df969431bef5e428b8afc40
Snapshot hash: sha256:9e10e7c376cb6af2420921c72a578301e735cd77488abc75c18518d7a48c4203
Supersedes: No previous snapshot in this series.

Source-native members

Lowest-resolution contributing observations, keyed by source system and source-native code; the descriptor is context, not identity.
Member type	Source system	Native code	Harmonised value	Member lineage	Source lineage
source_series	`faostat_live_animals`	`WLD`	131.96	`sha256:da3439237547…`	`sha256:0190bc43286c…`
source_series	`wb_livestock_index`	`WLD`	131.96	`sha256:a02405062fa8…`	`sha256:f38b9514efdf…`

Optics references

The source registry, publication calendar, freshness and source-to-index mapping behind this sub-index live on Global Optics.