I've shown below the total output from the garden by weight. The graph is dominated by the fact that I grew nearly 40 kg of potatoes in 2011 in the front garden to clear it ready for planting perennials. However, you can still see that 2013 was a big improvement on 2012, which was a pretty bad year for produce.
I haven't mentioned the inputs into the garden so far. The garden continues to be low input in terms of the effort required to maintain it. Most of the work is involved in harvesting and pruning. I've spent a little more time on growing salad crops this year in a couple of raised beds to complement the other output. I've worked on building up the soil a little in the last few years with inputs of compost, farmyard manure, ashes from the wood burner, bone meal and waste from pet rabbits, but none in very large quantities.