§ Mr. Flynn
To ask the Secretary of State for Social Security what is the estimated contribution income of the national insurance fund in each year from 1996–97 to 2001–01 and in(a) 2010 –11, (b) 2020 –21, and (c) 2030–31, assuming that in 1998 and subsequent years the lower and upper earnings limits rise (i) in line with prices, (ii) in line with earnings and (iii) the lower limit in line with prices and the upper limit in line with earnings; and what would be the additional income in each case if the upper limit were raised in April 1998 to the same proportion of average earnings as in April 1979. 
§ Mr. Heald
The information is not available in the format requested and could be provided only at disproportionate cost. Such information as is available is in the table.
National insurance fund contribution income: £ billion at 1994 –95 prices Year Lower and upper earnings limits increased in line with prices 1996–97 138.20 1997–98 139.10 1998–99 140.10 1999–00 141.15 2000–01 245.63 2010–11 255.36 2020–21 263.95 2030–31 270.07 Source: Government Actuary's Department. Notes: 1Calculations are based on the 1996 Budget PES assumptions. 2Calculations are based on assumptions adopted for the report by the Government Actuary on the third quinquennial review under section 137 of the Social Security Act 1975, HC 160.