To ask the Chancellor of the Exchequer what the total value is in (a) real terms and (b) cash terms of the total amount paid in national insurance top-up payments in each year since 1992–93. 
The information is given in the table.
|National insurance class 3 contributions receipts, UK|
|Financial year||(a) Real terms (2001–02 prices)||(b) Cash terms|
Real term prices calculated using the HMT GDP deflator series.
The Government Actuary's Department has provided these estimates.