The line graph illustrates the percentage the British citizens by car ownership, measured at ten-year intervals between 1975 and 2005. Overall, while most groups experienced fluctuations, the one-car owners group remained relatively stable. Additionally, the ranking of ownership groups by percentage were consistently maintained throughout the period.
Regarding the groups of people who had no car and just one car, these are also the two largest groups over time. In the first ten-year phase of the period, these two groups experienced exactly the same downturn trends. To be more specific, the one-car owner group started at 45% of British car owners, whereas this figure for people who did not own a car was almost the same, at approximately 43%; however, from this point, the two groups declined sharply until 1985, when their trends were no longer identical. The first group, which owned only one car, by 1985 had reached a low of under 40%, then recovered and finished with the initial percentage in 2005. Meanwhile, the proportion of people without cars decreased continually and significantly dropped to its trough at about 21% at the end of the period.
In contrast, the remaining groups witnessed upward trends throughout the period. The group of individuals owning three cars experienced the least fluctuating trend, starting at approximately 3%, rising steadily, and ending with just under 10% in 2005. Finally, the percentage of people who owned two cars grew considerably; with just about 7% at the beginning, it had reached 15% by 1985, which was a dramatic increase within just ten years. From this point, the figure climbed gradually and reached 18% in 2005. Notably, the rise in two-car ownership closely mirrored the decline in the no-car group.