Question: In what year did a micronation whose capital is Barringun, Queensland declare it's independence from Australia?

Context paragraphs:
Zero Obelisk: Zero Obelisk is a heritage-listed survey marker on the east bank of the Warrego River, Barringun, Shire of Paroo, Queensland, Australia.  It was established in 1879.  It was added to the Queensland Heritage Register on 21 October 1992.  The Zero Obelisk marks the beginning of the first official survey of the border between the colonies of Queensland and New South Wales in 1879-80.

Principality of Outer Baldonia: The Principality of Outer Baldonia is a now defunct micronation whose territorial pretensions comprised the roughly 4 acre of Outer Bald Tusket Island, the southernmost of the Tusket Islands, 8 nmi off the southern tip of the Canadian province of Nova Scotia.

TAFE Queensland Gold Coast: TAFE Queensland Gold Coast (formally known at Gold Coast Institute of TAFE or GCIT) is a vocational education and training (VET) organisation on the Gold Coast region of Queensland, Australia, with five campuses across Southport and Coomera, Ashmore and Coolangatta.  It is the largest in the region offering over 300 courses to more than 16,000 students annually.  TAFE Queensland Gold Coast is part of the TAFE Queensland network which is the largest and most experienced training provider in the State, delivering technical education for more than 130 years.  TAFE Queensland provides services to more than 180,000 students each year - more than all of Queensland's universities combined.

Camptown (country subdivision): A Camptown, in the country of Lesotho, refers to a district capital for one of the ten districts of Lesotho.  The largest camptown is the city of Maseru in Maseru District.  Camptowns are usually commerce hubs for the district and are the location for the central government offices for the district.  Camptowns usually take the same name as the district in which they are located.  For example, as mentioned the camptown for Maseru is Maseru but also the camptown for Thaba-Tseka District is Thaba-Tseka.  The exceptions to this rule are Berea District whose capital is called Teyateyaneng, Quthing District whose capital is called Moyeni and Leribe District whose capital is most often called Hlotse.

Barringun, Queensland: Barringun is a rural locality in Paroo Shire, Queensland, Australia, on the border with New South Wales.  Barringun is also the capital of the self-proclaimed Murrawarri Republic.

Principality of Marlborough: The Principality of Marlborough was a short-lived micronation established in 1993 located at near Marlborough, Queensland, Australia, about 200 km (124 mi) north of Rockhampton.

Murrawarri Republic: The Murrawarri Republic is a micronation that declared its independence from Australia in 2013, claiming territory straddling the border of the states of New South Wales-Queensland within Australia.  The territory is the traditional homeland of the Murrawarri people, an aboriginal nation, but the majority of the population is now non-indigenous Australians.  The government of Australia has not acknowledged the declaration of independence, and their independence has been wholly unrecognized.

Barony of Caux: The Sovereign Barony of Caux is a small micronation whose "restitution" occurred in 2001 on the basis of an ancient hereditary barony.  Its re-establishment occurred in 2015.  It claims territory in Shropshire, UK, and in the Pays de Caux in Normandy, France, but is based in North America.

Lunda Norte Province: Lunda Norte is a province of Angola.  It has an area of 103,760 km² and a population of 862,566.  Angola's first President, Agostino Neto, made Lucapa the provincial capital after independence, but the capital was later moved to Dundo.  The province borders the Democratic Republic of Congo in the northeast and Lunda Sul in the south.  Municipalities in this province include Capemba-Camulemba, Caumbo, Caungula, Chitato, Cuango, Cuilo, Lubalo, Lucapa, and Shah-Muteba.  The province is rich in gold and diamonds, but remains vastly underdeveloped and impoverished.  UNITA used the money generated from the sale of diamonds to fund war efforts.  Cuango River valley, the richest diamond area of Angola is located in the province.  Mining is done by notable companies like DeBeers and Endiama.  The Lunda province whose capital was Saurimo was created by the Portuguese colonial empire on July 13, 1895.  It was divided into Lunda-Sul and Lunda-Norte subdivisions through a constitution act in 1978 by the People's Movement for the Liberation of Angola (MPLA) government.  Iron and manganese mining are also important economic activities.  It is well known for its sculptures.  The most notable one is The Thinker ("O Pensador"), a sculpture of a man holding his head.  It is rich in terms of flora and fauna.

Giorgio Carbone: Giorgio Carbone (14 June 1936 – 25 November 2009) was an Italian who claimed to be head of state of the Principality of Seborga, a micronation whose extent is the Italian town of that name, but whose independent status is not yet recognised outside of Seborga.  He had assumed the title of Giorgio I, Prince of Seborga.

Supporting paragraphs: Barringun, Queensland Murrawarri Republic
Answer: 2013