In 2011, India, a founding member of the UN, returned to the Security Council (for the 2011-12 term) after a gap of __________ years.

India was elected a non-permanent member of the UN Security Council for 2011-12; its previous term had been 1991-92, so it returned after a gap of 19 years. The smaller figures would put its previous term in the late 1990s or early 2000s, when India was not on the Council.