§ Ms CorstonTo ask the Secretary of State for Social Security what is estimated to be the total value of(a) employers' and (b) employees' national insurance contributions; and what would be the corresponding total values if (i) contributions at present rates were collected on all earnings, (ii) contributions at present rates were extended only to earnings below the lower earnings level and (iii) contributions at present rates were extended only above the upper earnings level in (1) 1994–95, (2) 2000–01, (3) 2010–01, (4) 2020–01 and (5) 2030–01, at 1994 prices. [18914]