To ask the Scottish Executive how many (a) men and (b) women aged (i) under 30, (ii) 30 to 40, (iii) 41 to 50, (iv) 51 to 60, (v) 61 to 70, (vi) 71 to 80 and (vii) over 80 were diagnosed with bowel cancer in each year since 1997, broken down by NHS board.