Question: In what year was the nominate cheetah subspecies, that makes the Entabeni Game Reserve it's home, classified as Vulnerable by the IUCN?

Context articles: Entabeni Game Reserve
Moorook Game Reserve
Golden swallow
Loch Luna Game Reserve
South African cheetah
Falgore Game Reserve
Mud Islands Game Reserve
Tolderol Game Reserve
List of lemur species
Currency Creek Game Reserve

The Entabeni Game Reserve, Entabeni means 'place of the mountain', is a 220 km2 private reserve situated in the Waterberg in Limpopo Province in northern South Africa.
 The Entabeni Reserve is popular for safari trips because of the opportunity to see big game and a variety of birds and antelope species, as well as its beautiful scenery, and the fact that it is in a malaria-free zone.
 The reserve is home to Transvaal lion, African bush elephant, South African giraffe, African leopard, South African cheetah, warthog, African buffalo, hippopotamus and other safari animals in a variety of habitats.
Moorook Game Reserve is a protected area in the Australian state of South Australia covering the floodplain on the south side of the River Murray immediately south of the section of the Sturt Highway that passes between the towns of Kingston-on-Murray in the west and Cobdogla in the east.
 It is located about 180 km east north-east of the state capital of Adelaide.
 It was proclaimed on 2 September 1976.
 The Loch Luna Game Reserve immediately adjoins the game reserve’s northern boundary.
 It and the Loch Luna Game Reserve are reported as providing "significant wildlife habitat and are popular recreation sites, particularly for river-based activities and camping."
 The game reserve is classified as an IUCN Category VI protected area.
The golden swallow ("Tachycineta euchrysea") is a passerine in the swallow family, Hirundinidae.
 Two subspecies are recognised, the Jamaican "T. e. euchrysea" and "T. e. sclateri" of Hispaniola (Haiti and the Dominican Republic).
 It usually inhabits the hills on the interior of islands, preferring open country.
 Currently, this swallow is restricted to isolated montane forests that primarily consist of the Hispaniolan pine.
 This species is considered to be a vulnerable species by the International Union for Conservation of Nature (IUCN), although the nominate subspecies, "T. e. euchrysea", is likely extinct.
 The exact cause of extinction is unknown, but likely factors include predation by mammals and habitat loss, although the habitat loss theory is not supported by very much evidence.
 The last sighting of the nominate subspecies was in Hardwar Gap (located on the boundary between Saint Andrew and Portland parishes), with three birds being seen on 8 June 1989.
Loch Luna Reserve is a protected area covering the floodplain on the north side of the River Murray in South Australia between the towns of Kingston-on-Murray in the west and Cobdogla in the east.
 It is located about 180 km east north-east of the Adelaide city centre.
 It was proclaimed on 7 November 1985 with exception to a parcel of land known as Sugarloaf Hill within the boundaries of the game reserve which has been excluded from protection for the purpose of mining activity.
 The Moorook Game Reserve immediately adjoins the game reserve’s southern boundary.
 It and the Moorook Game Reserve are reported as providing "significant wildlife habitat and are popular recreation sites, particularly for river-based activities and camping."
 The game reserve is classified as an IUCN Category VI protected area.
The South African cheetah ("Acinonyx jubatus jubatus"), also known as the Namibian cheetah, is the most numerous and the nominate cheetah subspecies native to Southern Africa.
 Since 1986, it has been classified as Vulnerable by the IUCN.
 The South African cheetah live mainly in the lowland areas and deserts of the Kalahari, the savannahs of Okavango Delta and the grasslands of the Transvaal region in South Africa.
 In Namibia, cheetahs are mostly found in farmlands.
 The South African cheetah was first described by the German zoologist Johann Christian Daniel von Schreber under the trinomen "Felis jubatus jubatus" in the Dutch Cape Colony in 1775.
Falgore Game Reserve is protected ecosystem designated mainly for games protection in southern Kano State of northern Nigeria.
 This game reserve is located about 150 kilometers away from Kano city.
 It lies in Tudun Wada, Doguwa and Sumaila local government areas.
 It extends to the boundary line between Kano, Kaduna and Bauchi states respectively.
 It covers an area of about 1000 square kilometers and is traversed by the River Kano.
 Falgore game reserve lies on northern guinea savanna ecological belt.
 This ecosystem is bisected by River Kano.
 Falgore game reserve started as Kogin Kano forest reserve which was developed since the British colonial period in 1940s.
 The forest reserve was only upgraded into a game reserve in the 1960s and subsequently called Falgore game reserve.
Mud Islands Game Reserve is a protected area in South Australia covering ten islands at the southern side of Lake Alexandrina about 19 km south-east of Goolwa.
 The game reserve is described as providing ‘an ideal habitat for water birds, particularly waterfowl’ and that ‘duck shooting is permitted during open season.’
 The game reserve is classified as an IUCN Category VI protected area.
 Since 2000, the game reserve has been located within the boundaries of the gazetted locality, Coorong.
Tolderol Game Reserve is a protected area on the north-western side of Lake Alexandrina in South Australia about 11 km south-east of Langhorne Creek.
 The game reserve was proclaimed in 1970 ‘ as an experimental area for growing of variety of waterfowl food crops, in particular three-cornered bulrush,’ with duck shooting permitted during open seasons.
 The game reserve is classified as an IUCN Category VI protected area.
Lemurs are strepsirrhine primates, all species of which are endemic to Madagascar.
 They include the smallest primate in the world, Madame Berthe's mouse lemur, which weighs 30 g , and range up to the size of the indri, which can weigh as much as 9.5 kg .
 However, recently extinct species grew much larger.
 As of 2010, five families, 15 genera, and 101 species and subspecies of lemur were formally recognized.
 Of the 101 species and subspecies, the International Union for Conservation of Nature (IUCN) classified eight as Critically Endangered, 18 as Endangered, 15 as Vulnerable, four as Near Threatened, eight as Least Concern and 41 as Data Deficient; seven were yet to be evaluated.
 From 2000 through 2008, 39 new species were described and nine other taxa resurrected.
 By 2014, the number of species and subspecies recognized had increased to 105; of these, the IUCN classified 24 as Critically Endangered, 49 as Endangered, 20 as Vulnerable, three as Near Threatened, three as Least Concern and four as Data Deficient; two were yet to be evaluated.
Currency Creek Game Reserve is a protected area in the Australian state of South Australia located on the south-western side of Lake Alexandrina in the gazetted locality of Currency Creek about 0.5 km north-east of Goolwa.
 The game reserve was proclaimed under the "National Parks and Wildlife Act 1972" ‘for the management and conservation of waterfowl, particularly native game species’ with duck shooting permitted during open seasons.
 The game reserve is classified as an IUCN Category VI protected area.