The peso is the currency of Chile. The current peso has circulated since 1975, with a previous version circulating between 1817 and 1960. Its symbol is defined as a letter S with either one or two vertical bars superimposed prefixing the amount, $ or ; the single-bar symbol, available in most modern text systems, is almost always used. Both of these symbols are used by many currencies, most notably the United States dollar, and may be ambiguous without clarification, such as CLP$ or US$. The ISO 4217 code for the present peso is CLP. It is officially subdivided into 100 centavos, although there are no current centavo-denominated coins. The exchange rate was around CLP$600 to 1 United States dollar at the end of 2014 and as of 1 April 2018.