In China, tigers in farms number around 4000, while in the wild they are less than 1500, encompassing all the so-called sub species
Links:
[1] http://admin.indiaenvironmentportal.org.in/feature-article/tiger-farms-how-are-they-justifiable
[2] http://admin.indiaenvironmentportal.org.in/category/author/nicky-xavier
[3] http://admin.indiaenvironmentportal.org.in/category/journal/current-science
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/farm-residues
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/endangered-species
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/wildlife
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/wildlife-management
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/tiger-conservation
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/wildlife-trade
[10] http://admin.indiaenvironmentportal.org.in/category/thesaurus/china