As you probably know, inflation targeting, initially adopted by New Zealand in 1990, has been the choice of a growing number of central banks in both industrialised and emerging countries. As on November 2000, authors Mishkin and Schmidt-Hebbel had counted 19 inflation-targeting countries. Since then, the numbers have increased.
Precisely by how many is debatable and will depend on the precise definition of inflation-targeting countries but I note that the merits of inflation targeting continue to be debated in the US. Inflation targeting in South Africa was formally introduced on 23 February 2000 with the announcement of a 3 to 6 per cent target for 2002.