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

### Instruction:
What percent of respondents had no opinion on George H.W. Bush?

### Inputs:
table_name: table, columns: ['Result', 'Barack Obama', 'George H. W. Bush', 'Ronald Reagan', 'Jimmy Carter', 'Gerald Ford', 'Richard Nixon']

### Response:
SELECT George H. W. Bush FROM table WHERE Result = no opinion