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

### Instruction:
what are all the percent (1990) where state is united states

### Inputs:
table_name: table, columns: ['State', 'Norwegian Americans (1980)', 'Percent (1980)', 'Norwegian Americans (1990)', 'Percent (1990)', 'Norwegian Americans (2000)', 'Percent (2000)', 'Norwegian Americans (2009)', 'Percent (2009)']

### Response:
SELECT Percent (1990) FROM table WHERE State = United States