This year
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/years-ozone-hole-antarctica-5th-biggest
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/times-india-new-delhi
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/atmosphere-and-ozone-layer
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/ozone-layer
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/antarctica
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/nasa