Zloty is the official currency of Poland and is the most traded currency in Central Europe, ranking 22nd in the foreign exchange market. It was introduced on February 28, 1919, and circulated starting in 1924. Poland introduced the zloty to replace the Polish mark. In the early 1990s, due to inflation, the currency was redenominated. In 1995, 10,000 old zlotys became one new zloty, stabilizing the currency. Since then, the exchange rate has fluctuated between 3-4 zlotys per U.S. dollar. Although Poland is an EU member, most Poles strongly oppose adopting the euro. However, joining the EU required a commitment to adopting the euro once stability criteria were met. The zloty is divided into 100 groszy, and its abbreviation is PLN. Coins include denominations of 1, 2, 5, 10, 20, and 50 groszy, and 1, 2, 5 zlotys. The name "zloty" comes from the Polish word for "golden." Poland has five series of banknotes, featuring historically significant figures. In 2015 and 2017, new, more secure banknotes were issued, including a 500 zloty note. The zloty reached its highest value against the U.S. dollar in 2000.