Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
What's the percentage of immigrants in 2004 in the country with 2.1% of the immigrants in 2006?

### Inputs:
table_name: table, columns: ['Country', '% of all immigrants 2008', '% of all immigrants 2007', '% of all immigrants 2006', '% of all immigrants 2005', '% of all immigrants 2004']

### Response:
SELECT % of all immigrants 2004 FROM table WHERE % of all immigrants 2006 = 2.1%