Via the IMF by way of Wikipedia

1. United States
2. Japan
3. Germany
4. United Kingdom
5. France

In the half decade between 1995 and 2000, the list of the world’s four largest economies as measured by nominal GDP in $US remained unchanged in either composition or sequence. The identity of the world’s forth and fifth largest economies, switched such that the United Kingdom became ranked as number four and France ranked as number five as estimated by the International Monetary Fund.

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