The Maltese lira was on a par with the British pound sterling (GBP) until 13 December 1971; since then the lira had been allowed to float, anchored to a basket of reserve currencies. The lira had subsequently been worth around £1.60 sterling. After the Kuwaiti dinar, it was the second-highest-valued currency unit in the world, being worth US$3.1596 as of 28 April 2007. After the dollar weakened against other currencies in mid-2006, the lira was worth US$3.35289 as of 16 December 2007.