Title: Mexican peso
Content:  The Mexican peso (symbol: $; code: MXN) is the currency of Mexico. Modern peso and dollar currencies have a common origin in the 16th–19th century Spanish dollar, most continuing to use its sign, "$". The current ISO 4217 code for the peso is MXN; prior to the 1993 revaluation, the code MXP was used. The peso is subdivided into 100 centavos, represented by "¢". The Mexican peso is the 15th most traded currency in the world, the third most traded currency from the Americas (after the United States dollar and Canadian dollar), and the most traded currency from Latin America. , the peso's exchange rate was $23.51 per euro and $20.06 per U.S. dollar.
Title: Economy of Mexico
Content:  2004, 2005 and 2006, even though it is considered to be well below Mexico's potential growth. The Mexican peso is the currency (ISO 4217: MXN; symbol: $). One peso is divided into 100 centavos (cents). MXN replaced MXP in 1993 at a rate of 1000 MXP per 1 MXN. The exchanged rate remained stable between 1998 and 2006, oscillating between 10.20 and 11=3.50 MXN per US$, recently the Mexican peso parity took a hit under president Enrique Peña Nieto, lost in a single year 19.87% of its value and is currently at $20.37 (2017). Interest rates in 2007 were situated at around 7 percent, having reached a historic low in 2002 below 5 percent. Inflation 
Title: Cifrão
Content:  In Mexico, Colombia, Argentina and Chile, it was used for dollars, to distinguish from local currency which used the peso sign, a single-barred ⟨$⟩. However, the present convention in these countries is to specify USD (United States dollars) after the value.
Title: List of people on coins
Content:  Currency/Subdivision: Peso ($, 1821–Present)/Centavo (¢,  ) Currency Code: MXP (1821–1993) and MXN (1993–Present) See also Mexican peso.
Title: Mexican peso
Content:  "nuevo peso" was simply renamed to "peso", and new Series D banknotes were issued identical to Series C except for the word "nuevo" dropped. The ISO 4217 code, however, remained unchanged as MXN. The new Mexican peso, however, continued to depreciate versus the U.S. dollar, with the greenback rising sharply from MXN 3.4 to MXN 7.2 after the Mexican peso crisis of December 1994. It would then trade at 9-12 MXN/USD between 1998-2008, at 12-14 MXN/USD between 2008-2014, and at 18-20 MXN/USD between 2016-2019. Notwithstanding these various difficulties the Mexican currency has experienced much less cumulative inflation when compared to several other currencies in Latin America, and the Mexican peso is now among the 15 most traded currency units.
Title: List of people on coins
Content:  Currency: Peso (since 1821) Symbol: $ Subdivision: Centavo Symbol: ¢ Currency Code: MXN See also Mexican peso.
Title: Economy of Mexico
Content:  Mexico has a floating exchange rate regime. The floating exchange originated with reforms initiated after the December 1994 peso crash which had followed an unsustainable adherence to a short band. Under the new system, Banco de México now makes no commitment to the level of the peso exchange rate, although it does employ an automatic mechanism to accumulate foreign reserves. It also possesses tools aimed at smoothing out volatility. The Exchange Rate Commission sets policy; it is made up of six members—three each from the Ministry of Finance and Public Credit (Secretaría de Hacienda y Crédito Publico—SHCP) and the central bank, with the SHCP holding the deciding vote. In August 
Title: Coin wrapper
Content:  Currency: Mexican peso
Title: Mexican peso
Content: in gold: 1⁄2, 1, 2, 4 and 8 escudos, with 1 escudo ≈ 2 pesos or 16 reales. ; in silver: 1⁄2, 1, 2, 4 and 8 reales, with 1 peso = 8 reales. Coins issued from the 16th to 19th centuries under the Spanish American system of reales and escudos included Additionally, Mexico issued copper coins denominated in tlacos or 1⁄8th real. Post-independence silver coins were of the cap and ray design showing a radiant Phrygian cap marked "Libertad" (liberty), which became familiar to East Asian traders. This design ended in 1872 with the minting of "centavo" coins except for the silver 8-reales which was revived as a trade coin from 1873-1897.
Title: Mexican real
Content:   The real was a currency of Mexico, issued until 1897. There were 16 silver reales to 1 gold escudo, with 8 tlacos to the real. The peso, which circulated alongside the real and eventually replaced it, was equal to 8 reales. The first reales issued in Mexico were Spanish colonial reales. These were followed in 1822 by independent issues of Mexico. In 1863, Mexico began issuing a decimal currency based on the peso but coins denominated in reales (in particular 8 reales coins) continued to be minted until 1897.

Question: what kind of currency does mexico use?
Answer: United States dollar.