Another year goes by and I am still mostly avoiding using a car, chiefly because I don't have one. I finished the year with Sodn small = 2.58 and Sodn Large = 15.85.

My 2024 was a much better year than 2023 for actively travelling, and my use of infernal combustion was slightly lower overall despite a series of heroic motorbike rides throughout the year, but riding my motorbike is technically not driving a car for Soderberg Number purposes.
I had a bad start by being a passenger in a car on day one, but reined myself in until almost the end of February. And even that day was only because my plan of bike+train+bike ended with a flat tyre and no pump two miles after leaving the house. A couple more car days included a trip to Southport and then my first experience of Uber, when bestie and I were on holiday and buses were going to take too long to get around. Some further car days included picking up oil for my motorbike, a mad late evening dash into the Borders to look for aurora borealis (the day after the big event in May), and a couple of trips to the tip, to make it 13 car days in the year. I notched up 64 days on my motorbike, compared with 76 in 2023. This was partly because it's been off the road a couple of times and I've naturally reverted to cycling for the last three months.
I improved my use of public transport by a whopping 100% – up from 3 days to 6 days, taking the train on three whole days (although one of them was the Ravenglass & Eskdale, which isn't really public transport); I used the tram just once, for work, and I took a bus only twice: once when we'd had enough walking while on holiday, and then when I had a cold a couple of months ago and took my bike onboard the X62 to get home.
I also improved my walking, and was out on 48 days compared with 37 in 2023. Cycling was up too, to 162 days compared with 112 the year before. But that's still a month's worth of cycling journeys less than 2022. The reasons might have been more motorbiking when I was actually away from home for several days at a time, and also because in 2023 I didn't go anywhere on 126 days while in 2024 I got it down to 73 days. That's not bad, given the complete non-summer when it seemed to rain and rain.
I have no idea what my Patella Number was, but it was probably in single figures!