Understanding Society User Support

Hi,

I'm running a model on SAS which uses financial year, i.e. from 6 April to 5 April, so I want to see how USoc interview dates 'slot' into financial years.

I have read that even though fieldwork runs over 24 months for some samples, every sample member is interviewed approximately one year apart. the 24-month fieldwork period and annual interviews also means that waves overlap; in any calendar year, half of those samples are being interviewed for wave n and the other half for wave n+1. Therefore, I need to combine interviews across two consecutive waves in each year to produce calendar year specific waves.

The issue: This suggests participants should be interviewed once every financial year, but my concern is that a person could be interviewed on 5th April 2013 (end of 2012/13 FYR) and then 20th April 2014 (end of 2013/14 FYR), thus skipping the middle FYR (2013/14 FYR). could you tell me if this is the case, and if so what percentage of the sample could this be the case for ?

Thanks