Conversation so far:
when did el salvador switch to the dollar
The country adopted the US dollar as its currency in 2001.
what was El Salvador's currency before adopting the US dollar
Previously, its national currency was the El Salvadoran Colon and one colon was equal to 100 centavos.
how long did El Salvador use the colon
El Salvador used the colon currency from 1892 to 2001.
why did El Salvador change their currency
The dollar was adopted following the end of civil war that negatively impacted the economy. The government of El Salvador hoped that it would boost their economy.

Question: did it work
Self-contained rewrite: did El Salvador adopting the US dollar stabilize their economy