Below are the amounts that have gone through my joint a/c by percentage. Individual purchases and cash purchases are not included. This makes the figures slightly skewed particularly as Waitrose is my local shop and would probably warrant closer to 10% (usually cash).

Sainsbury's 53%
Tesco 38%
Waitrose 5%
Lidl 3%
Morrison's 1%

On request I will be able to produce stats for 2008 and 2009.

How about you?