National insurance deficiency notices for the six-year period from 1996-97 to 2001-02 were issued in a single exercise. A total of 10,021 million notices were issued in the period October 2003 to September 2004. It is not possible to break this figure down into individual years.
3,785 million notices were issued for 2002-03 tax year and 3,278 million notices were issued for 2003-04 tax year.