As the number of these types of systems increases, there will be an increased market size for a larger number and wider range of such end-use technologies. Patterns of travel vary tremendously around the world, as do the levels of travel per capita.18 Given high car ownership levels in OECD countries, an average of around 5 000 kilometres per year is travelled by car (except in OECD Pacific). In emerging economies and developing countries, no country or region has been found with more than 5 000 km of travel overall, across all modes (Figure 10).