To ask the Scottish Executive how many (a) pensioner households and (b) single pensioners live on an annual income of (i) up to £10,000, (ii) £10,001 to £15,000, (iii) £15,001 to £20,000, (ic) £20,001 to £30,000, (v) £30,001 to £50,000 and (vi) more than £50,000.