After the February 1966 military coup, the new leaders wanted to remove the face of Nkrumah from the banknotes. The "new cedi" (1967–2007) was worth 1.2 cedis, which made it equal to half of a pound sterling (or ten shillings sterling) at its introduction. Decades of high inflation devalued the new cedi, so that in 2007 the largest of the "new cedi" banknotes, the 20,000 note, had a value of about US$2. The new cedi was gradually phased out in 2007 in favor of the "Ghana cedi" at an exchange rate of 1:10,000. By removing four digits, the Ghana cedi became the highest-denominated currency unit issued in Africa. It has since fallen to about 20% of its original purchasing power when the currency was redenominated.