<p>It is not possible to provide an estimate of this kind as this information is not available. However, Ofcom research has found that 82% of UK adults with a landline reported receiving a nuisance call, during the four week research period at the start of 2013. Those who reported receiving a nuisance call reported receiving an average of about eight calls (8.4) over a four week period, which equates to approximately 2 calls per week and 26% reported more than 10 nuisance calls over the four week period. Ofcom will be repeating this diary-based research in 2014.</p>