Question: In which year was the party that had been represented in the Styrian parliament since 2005 formed?

Context paragraphs:
Styrian state election, 2010: The Styrian state election of 2010 was held in the Austrian state of Styria on 26 September 2010.  The Social Democratic Party of Austria, like the Austrian People's Party, lost 2 seats - also the Communist Party of Austria, which has been represented in the Styrian parliament since 2005.  The Freedom Party of Austria won 6 seats, while the Greens could defend their 3 seats.

Per Sandberg: Per Sandberg (born 6 February 1960) is a Norwegian politician for the Progress Party who has served as the Norwegian Minister of Fisheries since December 2015.  Sandberg has been a member of the Norwegian parliament since 1997 (since 2005 from the Sør-Trøndelag constituency, and before that from Nord-Trøndelag), and served as chair of the parliamentary standing committees on Justice, and Transport and Communications.  He has additionally held the position of first deputy leader of the Progress Party since 2006.

Roman Shin: Roman Shin is a deputy in the Jogorku Kenesh, the parliament of Kyrgyzstan, and a member of the Ata-Zhurt party.  He is member of the minority Korean ethnic group.  Roman Shin has been a Member of Parliament since 2005.  Since his reelection to the Jogorku Kenesh in 2010, he sits as a member of Ata-Zhurt (Fatherland) in that body.

Bishop Auckland (UK Parliament constituency): Bishop Auckland is a constituency represented in the House of Commons of the UK Parliament since 2005 by Helen Goodman of the Labour Party.

Communist Party of Austria: The Communist Party of Austria (German: "Kommunistische Partei Österreichs" , CPA or KPÖ) is a communist party in Austria.  Established in 1918 as the Communist Party of German-Austria (KPDÖ), it is one of the world's oldest Communist parties.  The KPÖ was banned between 1933 and 1945 under both the Austrofascist regime and the Nazi German control of Austria after the 1938 "Anschluss".  It played an important role in the Austrian resistance against the Nazis.

Christian Buchmann: Christian Buchmann (born September 27, 1962 in Graz) is an Austrian politician (Austrian People's Party) and Member of the Styrian Parliament.

East Antrim (UK Parliament constituency): East Antrim is a constituency represented in the House of Commons of the UK Parliament since 2005 by Sammy Wilson, a member of the Democratic Unionist Party.  The constituency has voted for unionist candidates since its re-creation in 1983.

Denton and Reddish (UK Parliament constituency): Denton and Reddish is a constituency represented in the House of Commons of the UK Parliament since 2005 by Andrew Gwynne of the Labour Party.

Bristol East (UK Parliament constituency): Bristol East is a constituency recreated in 1983 covering the eastern part of the City of Bristol, represented in the House of Commons of the UK Parliament since 2005 by Kerry McCarthy of the Labour Party.  An earlier guise of the seat existed between 1885 and 1950.

Putney (UK Parliament constituency): Putney is a constituency created in 1918 represented in the House of Commons of the UK Parliament since 2005 by Justine Greening of the Conservative Party, who has served as Secretary of State for Education as well as minister of Women and Equalities since 14 July 2016.

Supporting paragraphs: Styrian state election, 2010 Communist Party of Austria
Answer: 1918