Warning: these figures indicate the number of cases found in the data file. They cannot be interpreted as summary statistics of the population of interest.
Description
Definition
The survey period is divided into four sub-rounds of three months' duration each as follows:
sub-round 1 : July - September 1995
sub-round 2 : October - December 1995
sub-round 3 : January - March 1996
sub-round 4 : April - June 1996