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Nationalratswahlen seit 1919 – Parteistärke und Mandate

bfs-party-strength

Herausgeber
OFS/BFS
Zugriffsart
api
Tabellen-ID
je-d-17.02.02.03.01, je-d-17.02.02.02.01.01
Lizenz
BFS terms of use "OPEN BY": "Freie Nutzung. Quellenangabe ist Pflicht." (author, title and link to the dataset)
Abdeckung
Gebiet national · von 1919 · bis 2023
Lücken
National totals only (cantonal tables exist, not fetched). Seats are National Council seats only; Council of States results are not in these tables. Elections 1848–1917 are in a separate BFS table (je-d-17.02.02.02.01.05, seats by party and party current, 1848–1917), not fetched.
Verwendet in
STEER-01, STEER-04, AGORA-17, STEER-03
Bekannte Grenzen
CVP (to 2019) and BDP (2011–2019) merged into Die Mitte in 2021 (BFS footnote 5); Die Mitte has a row for 2023 only — successor_key links the earlier rows. LPS merged with FDP in 2009; from 2011 the BFS counts LP-BS and LP-VD lists under FDP (footnote 3). The BFS keeps one label per party across all elections, also where a party was renamed (footnote 7 — GRÜNE was "Grüne Partei der Schweiz (GPS)" until March 2021); how predecessors are grouped under a label is the BFS's choice (see its glossary, https://www.bfs.admin.ch/bfs/de/home/statistiken/kataloge-datenbanken/definitionen.assetdetail.27285175.html). Seats follow the list on which a member was elected, not later group membership (footnote 1) — they differ from parl-members, which is the current composition. FGA has shares but no seat entry ("*") in 2011–2019. In 1939 nine cantons had tacit elections (footnote 2).
Prüfung
verification date: 2026-10-31 · method: Fetched both tables from the BFS DAM (asset metadata: lifecycle CURRENT, published 2023-11-30). Compared the 2023 results with the Federal Chancellery's "Der Bund kurz erklärt 2026" (pp. 26–27, "Wähleranteil bei den Nationalratswahlen 2023" and National Council seats per party): SVP 27.9 %/62, SP 18.3 %/41, FDP 14.3 %/28, Die Mitte 14.1 %/29, GRÜNE 9.8 %/23, GLP 7.6 %/10, EVP 2 %/2, EDU 1.2 %/2, Lega 0.6 %/1, MCG 0.5 %/2 — all equal after rounding to one decimal; seats add up to 200. · checkedValue: 2023: SVP 27.9 % (BFS 27.9301588) and 62 seats · checkedAgainst: https://www.bk.admin.ch/dam/de/sd-web/B74oYqykWJXb/Der%20Bund%20kurz%20erkl%C3%A4rt%202026.pdf

Wie aktuell sind diese Daten?

Aktualität
Aktuell

Nach ihrem Aktualisierungsrhythmus ist noch keine neuere Ausgabe fällig.

Abgedeckter Zeitraum
1919–2023
Letzte Änderung der Daten
Letzte Abfrage der Quelle
Aktualisierungsrhythmus
Nach jeder Nationalratswahl (alle vier Jahre)

Vermerk im Register (auf Englisch): After each National Council election (every four years; tables of 30.11.2023 for the 22.10.2023 election; next election October 2027).

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Verarbeitungsschritte

  1. Download both XLSX tables (asset master files) and read them with the dependency-free reader scripts/fetch/xlsx-lite.ts. Script: scripts/fetch/bfs-party-strength.ts
  2. party = BFS party label of the strength table with footnote markers removed ("GRÜNE10" → "GRÜNE", "CVP 8" → "CVP"); the seats table's "MCR" is the strength table's "MCG (MCR)".
  3. share_pct = "Stärke der Parteien" in %, rounded half-up to one decimal (the table carries up to 15 decimals); seats = "Mandatsverteilung nach Parteien" as published.
  4. A row is written when the party has a share or a seat count that year. "*" (keine Kandidatur) → no value; "-> X" (merged into X) → no value, X becomes successor_key of all rows of that party.
  5. party_key / party_id = Federal Assembly party (parl-parties abbr_de / party_id): FDP→FDP-Liberale 15, CVP→CVP 14, Die Mitte→M-E 1586, SP→SP 12, SVP→SVP 13, LdU→LdU 17, EVP→EVP 18, CSP→CSP 27, GLP→glp 1336, BDP→BDP 1551, PdA→PdA 22, POCH→POCH 1579, GRÜNE→GRÜNE 20, SD→SD 19, EDU→EDU 24, FPS→FPS 21, Lega→Lega 23, MCG (MCR)→MCG 1576.
  6. Not mapped (party_key empty) — Dem. (parl has both "Demokraten" and "Demokraten dann Freisinnige"), LPS (parl 16 "LDP" is the Liberal-Demokratische Partei, not the national LPS), PSA, FGA, Sol., Rep. (no parl party), Übrige (residual group).
  7. Checks — seats of all parties = Total for every election (fails otherwise); the strength Total is 100 % ± 0.1 (fails otherwise) and the parties add up to it ± 0.05 (warns otherwise).
  8. Rows sorted by year, then seats, share and label (descending, label ascending).