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

### Instruction:
What is the sum of the stages for category 1 races after the year 2003?

### Inputs:
table_name: table, columns: ['Year', 'Stage', 'Category', 'Start', 'Finish', 'Leader at the summit']

### Response:
SELECT SUM Stage FROM table WHERE Category = 1 AND Year > 2003