Question: Since when has the Austrian party which is a member of Europe of Nations and Freedom had its current chair?

Context paragraphs:
Freedom Party of Austria: The Freedom Party of Austria (German: "Freiheitliche Partei Österreichs" , FPÖ) is a right-wing populist and national-conservative political party in Austria.  The party, led by Heinz-Christian Strache, is a member of the Europe of Nations and Freedom group in the European Parliament, as well as of the Movement for a Europe of Nations and Freedom.

Ingeborg Gräßle: Ingeborg Helen Gräßle ( ; born 2 March 1961) is a German politician and Member of the European Parliament (MEP) from Germany.  She is a member of the Christian Democratic Union of Germany, part of the European People's Party.  She is the current chair of the Budgetary Control Committee.  She has been a Member of the European Parliament (MEP) since 2004.

Heinz-Christian Strache: Heinz-Christian Strache (born 12 June 1969) is an Austrian right-wing politician, a member of parliament and former member of the Vienna city council, who has been Chairman of the Freedom Party of Austria (FPÖ) since 2005.  He prefers to call himself just 'HC' Strache.

Mary Mancini: Mary Mancini is an American political activist, former candidate, and current Chair of the Tennessee Democratic Party.  She was elected as Chair of the Tennessee Democratic Party on January 10, 2015 as the second woman to be elected to that position.  She was a candidate for Tennessee State Senate District 21 and lost in the 2014 Democratic primary to Jeff Yarbro.  She had prior served as Executive Director of Tennessee Citizen Action, an advocacy group based in Nashville.  She also was the co-host of Liberadio, a liberal radio show.  From 1991 to 1998 she was the owner of Lucy's Record Shop.

Karen Carter Peterson: Karen Carter Peterson (born November 1, 1969) is a Democratic member of the Louisiana State Senate, having represented the 5th District since 2010.  She is also the current Chair of the Louisiana Democratic Party.  Peterson is the first woman to serve in this role.  Since 2008, Peterson has served as Democratic National Committeewoman for Louisiana.  Peterson previously served in the Louisiana House of Representatives.

Larry Phillips (Washington politician): Larry Phillips is a member and current Chair of the King County Council in Washington state.  Phillips has served on the Council since 1991, representing the fourth district, which includes the Seattle neighborhoods of Queen Anne, Magnolia, Ballard, Fremont, Belltown, South Lake Union, and Downtown.  He previously served as Chair of the King County Council from 2004 to 2006 before being elected chair again in 2014.  He was unopposed in his 2011 re-election.  Phillips also serves on the Board of Directors of Sound Transit, a regional transit organization serving the Puget Sound area.  A hallmark of Phillips' council years has been his work to preserve forests and farmland by buying land, development rights, or conservation easements.  Phillips is a self-identified Democrat, although his position on the King County Council is officially nonpartisan.  On April 1, 2015, Phillips announced he would not seek reelection to the King County Council that November.

Libertarian Party of New Hampshire: The Libertarian Party of New Hampshire is the New Hampshire affiliate of the Libertarian Party of the United States.  It is currently the third largest political party in the state of New Hampshire and is a ballot qualified party.  There are currently three seats in the New Hampshire House of Representatives held by its members.  The party's current chair is Darryl W. Perry.

Ronald Gilgenbach: Dr. Ronald M. Gilgenbach is a Professor and the current Chair of the Nuclear Engineering and Radiological Sciences Department at the University of Michigan.  He is international recognized for his storied career in the field of Plasma Physics, including some of the earliest tokamak plasma research in the United States.  Dr. Gilgenbach has been at the University of Michigan since 1980 and has held his current position as Chair of the Nuclear Engineering and Radiological Sciences Department since 2010.  Still active in research, he is also the lead faculty of the Plasma, Pulsed Power, and Microwave Laboratory at the University of Michigan.

Iskra Mihaylova: Iskra Mihaylova (Bulgarian: Искра Михайлова ) (born 7 September 1957), is a Bulgarian politician and Member of the European Parliament (MEP) from Bulgaria.  She has been a Member of the European Parliament since July 2014.  She is a member of the Movement for Rights and Freedoms, part of the Alliance of Liberals and Democrats for Europe Party.  She is the current chair of the European Parliament Committee on Regional Development.

Social Democratic Party of Finland: The Social Democratic Party of Finland (Finnish: "Suomen Sosialidemokraattinen Puolue" , SDP, colloquially "demarit"; Swedish: "Finlands Socialdemokratiska Parti" ) is one of the four major political parties in Finland, along with the National Coalition Party, The Finns Party and the Centre Party.  Antti Rinne is the party's current chair.  The party has been represented in the Finnish cabinet for long periods, and has set many fundamental policies of the Finnish state.  The party is currently in the opposition.  The party's ideology is social democracy.  The SDP has a close relationship with the Central Organisation of Finnish Trade Unions (SAK), and is a member of the Socialist International and the Party of European Socialists.

Supporting paragraphs: Freedom Party of Austria Heinz-Christian Strache
Answer: 2005